JP2002078071

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DESCRIPTION JP2002078071
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
MFB (motional feedback) speaker system in which vibration information of a speaker unit is fed
back to an input signal. The present invention relates to an MFB speaker system suitable for
improving characteristics such as frequency band expansion.
[0002]
2. Description of the Related Art FIG. 14 shows a "Speaker system (upper and lower)" edited by
Takeo Yamamoto (radio technology company, published on July 15, 1977), P.I. FIG. 16 is a
circuit block diagram showing a configuration example of a conventional MFB speaker system
disclosed in 406. In the figure, 100 is a signal input terminal to the speaker, 110 is an amplifier
with a gain of GA, 120 is a feedback circuit with a gain of β, and 130 is a speaker with voltage
gain GS. Symbol Ei indicates an input voltage, Ev indicates an input voltage to the speaker 130,
and Es indicates an output voltage from the speaker 130.
[0003]
Next, the operation will be described. The electric signal input from the signal input terminal 100
is amplified by the amplifier 110 to drive the speaker 130. Sound is emitted from the speaker
130 by the vibration of the diaphragm, and at the same time the vibration of the diaphragm is
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detected by signal detection means (not shown) provided inside the speaker 130 and is sent to
the feedback circuit 120. The signal fed back by the feedback circuit 120 is combined with the
input signal from the signal input terminal 100 to drive the speaker 130.
[0004]
In the MFB speaker system, the amplifier 110 is used to drive the speaker 130. Also, the
amplifier 110 is associated with the feedback circuit 120 and the speaker 130, and the whole
functions as one system. Also, in the conventional MFB speaker system, the signal to the
feedback circuit 120 is normally returned to the input signal in the negative polarity (negative
feedback) in order to reduce distortion and improve the characteristics.
[0005]
FIG. 15 is a structural block diagram showing the configuration of the MFB speaker system
shown in FIG. The same reference numerals as in FIG. 14 denote the same or corresponding parts
in FIG. In the figure, 10 is an adder / subtractor for adding or subtracting the feedback signal
output from the feedback circuit 120 and the input signal input from the signal input terminal
100, 30 is a closed cabinet for a closed speaker system, 35 is a closed cabinet The speaker unit
40 is a vibration sensor for detecting vibration information of the speaker unit diaphragm.
[0006]
When the MFB speaker system shown in FIG. 15 is applied to a speaker system using a plurality
of sealed speaker systems in which a speaker unit is arranged in a sealed cabinet in combination,
the configuration is represented by a structural block diagram shown in FIG. . In the figure, 10-1,
10-2,... 10-n are addition / subtraction for adding or subtracting the feedback signal output from
the feedback circuit in each closed speaker system and the input signal input from the signal
input terminal 100. 20-1, 20-2,... 20-n are power amplifiers for amplifying the signals output
from the respective adders / subtractors to drive the speaker unit, 130-1, 130-2,. A closed
cabinet for a speaker system, and each closed cabinet has a different volume. 35-1, 35-2, ... 35-n
are speaker units, 40-1, 40-2, ... 40-n are vibration sensors for detecting vibration information of
the diaphragm for speaker units, 50-1, 50 2, ..., 50-n are feedback circuits.
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[0007]
SUMMARY OF THE INVENTION Since the conventional MFB speaker system is configured as
described above, when the number of closed speaker systems used increases, the abovementioned difference is caused by the difference in volume of each closed cabinet, etc. In order
to cope with the differences in the characteristics of each sealed speaker system, there is a
problem that an adder / subtractor, an amplifier, a vibration sensor, and a feedback circuit are
individually required for each of the sealed speaker systems, and the system as a whole becomes
large and complicated The
[0008]
The present invention has been made to solve the above-mentioned problems, and a vibration
sensor for detecting vibration information even if the number of speaker units used is increased,
the vibration relative to the input signal of the speaker system It is an object of the present
invention to provide an MFB speaker system that can be configured with a minimum number of
adders / subtractors, amplifiers, feedback circuits, and the like for performing feedback
processing based on information, and that enlargement and complication can be avoided.
[0009]
SUMMARY OF THE INVENTION The MFB speaker system according to the present invention
includes a plurality of speaker units mounted in a closed cabinet, and a wire connection structure
in which input voltages to the respective speaker units are the same. Speaker system in which the
speaker units of the same specification are connected, a vibration sensor for detecting vibration
information of one of the speaker units constituting the speaker system, and vibration
information detected by the vibration sensor Are returned to the input side of the speaker
system, and feedback means for performing feedback processing on an input signal to the
speaker system according to the vibration information is provided.
[0010]
The MFB speaker system according to the present invention has a structure in which each
speaker unit connected by a wire connection structure in which the input voltage is the same as
that of the other speaker units is mounted in an independent sealed cabinet of the same volume.
The speaker system is provided.
[0011]
The MFB speaker system according to the present invention has a structure in which each
speaker unit connected in a wire connection structure in which the input voltage is the same as
that of the other speaker units is mounted in a common sealed cabinet. It is intended to have a
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system.
[0012]
In the MFB speaker system according to the present invention, the left speaker units connected
in the same wire connection structure as the left speaker unit having the same input voltage are
mounted in the left sealed cabinet of the same volume independently. A structure in which the
left speaker system having the structure and the right speaker units connected by the connection
structure in which the input voltage is the same as the other right speaker units are mounted in
the right sealed cabinet of the same volume independently. And the right speaker system.
[0013]
The MFB speaker system according to the present invention has a structure in which each left
speaker unit connected by a wire connection structure in which the input voltage is the same as
other left speaker units is mounted in a common left sealed cabinet. A speaker system on the left
side and a speaker system on the right side having a structure in which right side speaker units
connected by the same wire connection structure as the other right side speaker units are
mounted in a common right side sealed cabinet It is something which is prepared.
[0014]
The MFB speaker system according to the present invention has a configuration in which
specifications of the left speaker unit and the right speaker unit, and volumes of the left sealed
cabinet and the right sealed cabinet are the same.
[0015]
The MFB speaker system according to the present invention comprises a left vibration sensor for
detecting vibration information of one left speaker unit of the left speaker units constituting the
left speaker system, and each of the left speaker units constituting the right speaker system. The
right side vibration sensor for detecting vibration information of one of the right side speaker
units and the vibration information detected by the left side vibration sensor are returned to the
input side of the left side speaker system to the left side speaker system Left feedback means for
performing feedback processing by the vibration information to the input signal of the above,
and vibration information detected by the right vibration sensor is returned to the input side of
the speaker system on the right, and input signal to the speaker system on the right And right
side feedback means for performing feedback processing based on the vibration information.
Those were Unishi.
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[0016]
The MFB speaker system according to the present invention is characterized in that the left side
detects vibration information of one speaker unit from each left speaker unit constituting the left
speaker system or each right speaker unit constituting the right speaker system. And vibration
information common to the speaker system on the right side and vibration information common
to the speaker system on the left side and the right side detected by the vibration sensor is
returned to the input side of the speaker system on the left side and the speaker system on the
right side; And feedback means for performing feedback processing based on the vibration
information on an input signal to the speaker system on the right side and the speaker system on
the right side, and feedback means having a feedback circuit common to the speaker systems on
the left side and the right side. .
[0017]
In the MFB speaker system according to the present invention, the speaker units are connected
in a parallel connection structure in which the input voltage is the same as that of the other
speaker units.
[0018]
In the MFB speaker system according to the present invention, the speaker units are connected
in a serial connection structure in which the input voltage is the same as that of the other
speaker units.
[0019]
In the MFB speaker system according to the present invention, the speaker units are connected
in a series-parallel connection structure in which the input voltage is the same as that of the
other speaker units.
[0020]
In the MFB speaker system according to the present invention, the input voltage to each speaker
unit is the same between the left speaker units, between the right speaker units, and between the
left speaker unit and the right speaker unit. The left speaker unit and the right speaker unit are
connected in parallel.
[0021]
In the MFB speaker system according to the present invention, the input voltage to each speaker
unit is the same between the left speaker units, between the right speaker units, and between the
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left speaker unit and the right speaker unit. The left speaker unit and the right speaker unit are
connected in series.
[0022]
In the MFB speaker system according to the present invention, the input voltage to each speaker
unit is the same between the left speaker units, between the right speaker units, and between the
left speaker unit and the right speaker unit. The left speaker unit and the right speaker unit are
connected in series and in parallel.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will
be described below.
Embodiment 1
FIG. 1 is a structural block diagram showing the configuration of the MFB speaker system (a
speaker system of motional feedback type in which vibration information of a speaker unit is fed
back to an input signal) according to the first embodiment. In FIG. , 30-n are enclosed cabinets of
substantially the same volume, 35-1, 35-2,... 35-n are attached to each enclosed cabinet Speaker
units having substantially the same specifications and connected in parallel, 40 is a vibration
sensor for detecting vibration information from any one of the speaker units 35-1, 35-2, ... 35-n,
50 is a feedback circuit (feedback means) of gain β for generating a feedback signal from the
signal output from the vibration sensor 40, and 10 is a feedback circuit 5 An adder-subtractor
(feedback means) for adding or subtracting the feedback signal output from the input signal from
the signal input terminal, and 20 amplifies the signal output from the adder-subtractor 10 and
amplifies the signal by the amplified signal It is a power amplifier (feedback means) for driving
the units 35-1, 35-2, ... 35-n.
[0024]
Next, the operation will be described.
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An external input signal applied to the signal input terminal 100 is applied to the speaker units
35-1, 35-2,... 35-n connected in parallel via the adder-subtractor 10 and the power amplifier 20.
Next, vibration information from any one speaker unit is detected by the vibration sensor 40 and
is fed back to the adder / subtractor 10 via the feedback circuit 50.
In the adder-subtractor 10, the input signal and the feedback signal output from the feedback
circuit 50 are combined, and the combined signal is added to the power amplifier 20 for driving
the speaker units 35-1, 35-2,. Be
[0025]
In FIG. 1, the speaker units 35-1, 35-2,... 35-n have substantially the same specifications and are
connected in parallel.
Furthermore, since they are attached to the closed cabinets 30-1, 30-2, ... 30-n having
substantially the same volume, the input voltage to each speaker unit is almost the same, that is,
the vibration of each speaker unit is about any speaker unit. It becomes the same.
This means that the vibration of each speaker unit is represented by the vibration of any one
speaker unit, and by using the vibration information of any one speaker unit, the vibration of the
other speaker units Can also be controlled.
Therefore, even if the number of sealed speaker systems in which the speaker units are mounted
in the sealed cabinet increases, the MFB speaker is configured to include the vibration sensor 40,
the feedback circuit 50, the adder / subtractor 10, and the power amplifier 20 one by one. It is
possible to realize the system.
[0026]
As described above, according to the first embodiment, in the speaker system using a plurality of
closed type speaker systems in which the speaker units are mounted in the closed type cabinet in
combination, substantially the same connection is made in parallel. .. 35-n of the specification
and enclosed cabinets 30-1, 30-2,... 30-n of approximately the same volume, and any of the
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speaker units A vibration sensor 40 for detecting vibration information from one, a feedback
circuit 50 for controlling a signal output from the vibration sensor 40, and adding or subtracting
a feedback signal from the feedback circuit 50 and an input signal Adder / subtractor 10, a
power amplifier for amplifying a signal output from the adder / subtractor 10 and driving the
speaker system by the amplified signal Since 0 is provided, each speaker unit 35-1, 35-2, ... 35-n
is connected in parallel, and even if applied to a speaker system in which each speaker unit is
respectively attached to a closed cabinet, a vibration sensor 40, and one feedback circuit 50, one
adder / subtractor 10, and one power amplifier 20 may be provided, which has an effect of
obtaining an MFB speaker system capable of avoiding an increase in size and complexity of the
entire system.
[0027]
Embodiment 2 FIG.
FIG. 2 is a structural block diagram showing the configuration of the MFB speaker system of the
second embodiment.
The same reference numerals as in FIG. 1 denote the same or corresponding parts in FIG.
In the second embodiment, the speaker units 35-1, 35-2,... 35-n are attached to the closed
cabinets 30-1, 30-2,. 35-1, 35-2, ... 35-n are connected in series.
[0028]
Next, the operation will be described.
An external input signal applied to the signal input terminal 100 is applied to the speaker units
35-1, 35-2,... 35-n connected in series via the adder-subtractor 10 and the power amplifier 20.
Next, vibration information is detected by the vibration sensor 40 from any one of the speaker
units 35-1, 35-2, ... 35-n, and is fed back to the adder / subtractor 10 through the feedback
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circuit 50. Ru.
In the adder-subtractor 10, the input signal and the feedback signal output from the feedback
circuit 50 are combined, and the combined signal is added to the power amplifier 20 for driving
the speaker units 35-1, 35-2,. Be
[0029]
In the structural block diagram of FIG. 2, the speaker units 35-1, 35-2,... 35-n have substantially
the same specifications and are connected in series.
Furthermore, since they are attached to the closed cabinets 30-1, 30-2, ... 30-n having
substantially the same volume, the input voltage to each speaker unit is almost the same, that is,
the vibration of each speaker unit is about any speaker unit. It becomes the same.
This means that the vibration of each speaker unit is represented by the vibration of any one
speaker unit, and by using the vibration information of any one speaker unit, the vibration of the
other speaker units Can also be controlled.
Therefore, even if the number of sealed speaker systems used by connecting the speaker units in
series increases, the MFB speaker is configured to include the vibration sensor 40, the feedback
circuit 50, the adder / subtractor 10, and the power amplifier 20 one by one. It is possible to
realize the system.
[0030]
As described above, according to the second embodiment, substantially the same specifications
connected in series in the speaker system using a plurality of sealed speaker systems in which
the speaker units are mounted in the sealed cabinet are combined and used. .. 35-n and closed
cabinets 30-1, 30-2,... 30-n of substantially the same volume, and any one of the speaker units.
Vibration sensor 40 for detecting vibration information from each sensor, a feedback circuit 50
for generating a feedback signal from a signal output from the vibration sensor 40, a feedback
signal output from the feedback circuit 50, and an input signal from the outside Adder /
subtractor 10 for adding or subtracting the signals, amplifying a signal output from the adder /
subtractor 10, and combining a plurality of the closed speaker systems Since the power amplifier
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20 for driving the speaker system to be used by the amplified signal is provided, a plurality of
sealed speaker systems in which the speaker units 35-1, 35-2,... 35-n are connected in series are
provided. Even if it is applied to the speaker system of the combined configuration, the vibration
sensor 40, the feedback circuit 50, the adder-subtractor 10, and the power amplifier 20 only
have to be provided one by one. There is an effect that a speaker system can be obtained.
[0031]
Embodiment 3 FIG.
FIG. 3 is a structural block diagram showing the configuration of the MFB speaker system of the
third embodiment. In FIG. 3, the same or corresponding parts as in FIG. In the figure, 30-1, 30-2,
... 30- (2m-1), 30-2m are even-numbered closed cabinets of substantially the same volume, 35-1,
35-2, ... 35-. (2 m-1) and 35-2 m are the same number (even number) as the number of the
closed type cabinets, are attached to each closed type cabinet, and are speaker units of
substantially the same specifications. These speaker units are connected in series as a set of two
speaker units connected in parallel: speaker unit 30-1 and speaker unit 30-2, speaker unit 30-3
and speaker unit 30-4,. Series-parallel connection configuration. The set of speaker units
connected in parallel may be configured of three or more speaker units.
[0032]
Next, the operation will be described. The input signal externally applied to the signal input
terminal 100 is the speaker units 35-1, 35-2, ... 35- (2 m-1), 35-2 m connected in series and
parallel via the adder-subtractor 10 and the power amplifier 20. Added to Next, vibration
information from any one of the speaker units 35-1, 35-2, ... 35- (2m-1), 35-2m is detected by
the vibration sensor 40, and the feedback circuit 50 is detected. Are fed back to the adder /
subtractor 10 via The adder-subtractor 10 combines an external input signal and a feedback
signal that is the output of the feedback circuit 50, and the combined signal is the speaker units
35-1, 35-2, ... 35- (2 m-1), 35. It is added to the power amplifier 20 for driving −2 m.
[0033]
In the structural block diagram of FIG. 3, the number of enclosed cabinets and speaker units is
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the same and is selected from an even number. Further, the speaker units 35-1, 35-2, ... 35- (2m1), 35-2m have substantially the same specifications, and are connected in series and in parallel
in such a combination that the input voltage to each speaker unit becomes the same.
Furthermore, they are respectively attached to closed cabinets of substantially the same volume.
Therefore, the vibration of each speaker unit is almost the same in any speaker unit. This means
that the vibration of each speaker unit is represented by the vibration of any one speaker unit,
and by using the vibration information of any one speaker unit, the vibration of the other speaker
units Can also be controlled.
[0034]
Therefore, even for a speaker system in which the number of closed speaker systems is increased
by connecting the speaker units 35-1, 35-2, ... 35- (2m-1), 35-2m in series and parallel. The
vibration sensor 40, the feedback circuit 50, the adder / subtractor 10, and the power amplifier
20 may be provided one by one, and there is an effect that an MFB speaker system can be
obtained which can avoid upsizing and complication of the entire system.
[0035]
FIG. 4 is a connection diagram when four speaker units are used.
The series-parallel connection in which the input voltage to each speaker unit is the same when
four speaker units are used is only one of the configurations shown in FIG. 3 other than the
series-parallel connection shown in FIG.
[0036]
FIG. 5 is a connection diagram when six speaker units are used. Combinations of series-parallel
connection in which input voltages to the speaker units are the same are of two types shown in
FIGS. 5 (a) and 5 (b) other than the series-parallel connection shown in FIG.
[0037]
FIG. 6 is a connection diagram when eight speaker units are used. There are three combinations
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of the series-parallel connection in which the input voltage to each speaker unit is the same,
except for the series-parallel connection shown in FIG. 3, as shown in FIGS. 6 (a), (b) and (c). If
the number of speaker units is an even number of 10 or more, the combination is further
increased, but basically, any combination in series-parallel connection such that the input voltage
to each speaker unit is the same Of course it is good.
[0038]
As described above, according to the third embodiment, in the speaker system using a plurality of
sealed speaker systems in combination, the speaker units 35-1 and 35-5 of substantially the
same specifications connected in series and parallel are used. 2, ... 35-(2 m-1), 35-2 m, and
similar closed type cabinets 30-1, 30-2, ... 30-(2 m -1), 30-2 m and their speakers A vibration
sensor 40 for detecting vibration information from any one of the units, a feedback circuit 50 for
generating a feedback signal from the output of the vibration sensor 40, and a feedback signal as
an output of the feedback circuit 50 10 for adding or subtracting an input signal from the input
signal, and a speaker system in which a signal output from the adder / subtractor 10 is amplified
to combine a plurality of closed speaker systems. Since the power amplifier 20 which drives by
the said amplified signal is provided, several closed type speakers in which the speaker units 351, 35-2, ... 35- (2m-1), 35-2m are connected in series and parallel Even if it is applied to a
speaker system having a system configuration, it is sufficient to provide only one vibration
sensor 40, one feedback circuit 50, one adder / subtractor 10, and one power amplifier 20,
thereby making it possible to avoid upsizing and complication of the entire system. There is an
effect that an MFB speaker system can be obtained.
[0039]
Embodiment 4
FIG. 7 is a structural block diagram showing a configuration of the MFB speaker system of the
fourth embodiment. In FIG. 7, the same or corresponding parts as in FIG. In the figure, reference
numeral 30 denotes a closed cabinet, and 35-1, 35-2,... 35-n are speaker units attached to the
closed cabinet 30 and connected in parallel with substantially the same specifications.
[0040]
Next, the operation will be described. An external input signal applied to the signal input terminal
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100 is applied to the speaker units 35-1, 35-2,... 35-n connected in parallel via the addersubtractor 10 and the power amplifier 20. Next, vibration information from any one of the
speaker units 35-1, 35-2,... 35-n is detected by the vibration sensor 40 and is fed back to the
adder / subtractor 10 through the feedback circuit 50. Ru. In the adder-subtractor 10, the input
signal and the feedback signal output from the feedback circuit 50 are combined, and the
combined signal is added to the power amplifier 20 for driving the speaker units 35-1, 35-2,. Be
[0041]
In the structural block diagram of FIG. 7, the speaker units 35-1, 35-2,... 35-n have substantially
the same specifications and are connected in parallel. Furthermore, since these speaker units are
attached to the common closed cabinet 30, the acoustic load applied to each speaker unit is the
same, that is, the vibration of each speaker unit is almost the same for any speaker unit. This
means that the vibration of each speaker unit is represented by the vibration of any one speaker
unit, and by using the vibration information of any one speaker unit, the vibration of the other
speaker units Can also be controlled. Therefore, even if the number of speaker units used by
attaching to the common sealed cabinet 30 increases, the MFB speaker system is configured to
include the vibration sensor 40, the feedback circuit 50, the adder / subtractor 10, and the
power amplifier 20 one by one. It is possible to realize
[0042]
As described above, according to the fourth embodiment, the speaker units 35-1, 35-2,... 35-n of
substantially the same specifications connected in parallel are attached to the common enclosed
cabinet 30, and A vibration sensor 40 for detecting vibration information from any one of the
speaker units, a feedback circuit 50 for generating a feedback signal from an output of the
vibration sensor 40, and a feedback signal which is an output of the feedback circuit 50; Adder /
subtractor 10 for adding or subtracting an external input signal, and a configuration in which a
signal from the adder / subtractor 10 is amplified and a plurality of speaker units attached to a
common enclosed cabinet 30 are used in combination Since the power amplifier 20 for driving
the speaker system of the present invention is provided, a plurality of speaker units attached to
the common enclosed cabinet 30 can be Even if it is applied to a speaker system used in
combination, only one vibration sensor 40, one feedback circuit 50, one adder / subtractor 10,
and one power amplifier 20 may be provided, and the MFB can avoid enlargement and
complication of the entire system. There is an effect that a speaker system can be obtained.
[0043]
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Embodiment 5 FIG.
FIG. 8 is a structural block diagram showing the configuration of the MFB speaker system of the
fifth embodiment. In FIG. 8, the same or corresponding parts as in FIG. In the MFB speaker
system of the fifth embodiment, the speaker units 35-1, 35-2,... 35-n have substantially the same
specifications as in the fourth embodiment, but are connected in series.
[0044]
Next, the operation will be described. An external input signal applied to the signal input terminal
100 is applied to the speaker units 35-1, 35-2,... 35-n connected in series via the addersubtractor 10 and the power amplifier 20. Next, vibration information from any one of the
speaker units 35-1, 35-2,... 35-n is detected by the vibration sensor 40, and is fed back to the
adder / subtractor 10 via the feedback circuit 50. Be done. In the adder-subtractor 10, the input
signal and the feedback signal output from the feedback circuit 50 are combined, and the
combined signal is added to the power amplifier 20 for driving the speaker units 35-1, 35-2,. Be
[0045]
The speaker units 35-1, 35-2,... 35-n have substantially the same specifications, are connected in
series, and are attached to the common enclosed cabinet 30, so that the sound added to each
speaker unit is added. The load is the same, that is, the vibration of each speaker unit is almost
the same for any speaker unit. This means that the vibration of each speaker unit is represented
by the vibration of any one speaker unit, and by using the vibration information of any one
speaker unit, the vibration of the other speaker units Can also be controlled. Therefore, even if
the number of speaker units used by attaching to the common sealed cabinet 30 increases, the
MFB speaker system is configured to include the vibration sensor 40, the feedback circuit 50, the
adder / subtractor 10, and the power amplifier 20 one by one. Can be realized.
[0046]
As described above, according to the fifth embodiment, the speaker units of substantially the
same specifications connected in series are attached to the common enclosed cabinet 30, and
vibration information of any one of the speaker units is attached. , A feedback circuit 50 for
generating a feedback signal from the output of the vibration sensor 40, and for adding or
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subtracting a feedback signal output from the feedback circuit 50 and an external input signal.
Adder / subtractor 10 amplifies a signal output from adder / subtractor 10, and drives a speaker
system in which speaker units 35-1, 35-2,... 35-n connected in series are attached to a common
enclosed cabinet 30 Because the power amplifier 20 is provided in series, the speaker units 35-1,
35-2,... 35-n connected in series have a common sealed key. When applied to a speaker system
having a configuration attached to the vignette 30, it is sufficient to provide one each of the
vibration sensor 40, the feedback circuit 50, the adder-subtractor 10, and the power amplifier
20. There is an effect that an MFB speaker system can be obtained that can avoid the
[0047]
Embodiment 6 FIG.
FIG. 9 is a structural block diagram showing the configuration of the MFB speaker system of the
sixth embodiment. In FIG. 9, the same or corresponding portions as in FIG. In the figure, 31 is a
closed cabinet, 35-1, 35-2, ... 35- (2m-1), 35-2m are speaker units attached to the closed cabinet
31 and connected in substantially the same specification and connected in series and parallel. is
there. In this case, a plurality of patterns can be considered for the arrangement configuration of
the speaker units on the speaker unit mounting surface of the closed cabinet 31. However, in the
sixth embodiment, the speaker units are arranged in a row to the speaker unit mounting surface.
. Then, a plurality of sets of two speaker units connected in parallel as one set are disposed on
the speaker unit mounting surface. The number of speaker units constituting the set of speaker
units is not limited to two.
[0048]
Next, the operation will be described. The external input signal applied to the signal input
terminal 100 is a speaker unit 35-1, 35-2,. Added to 2m. Next, vibration information from any
one speaker unit is detected by the vibration sensor 40 and is fed back to the adder / subtractor
10 via the feedback circuit 50. The adder-subtractor 10 combines the input signal with the
feedback signal which is the output of the feedback circuit 50, and this composite signal drives
the speaker units 35-1, 35-2, ... 35- (2 m-1), 35-2 m. To the power amplifier 20 to
[0049]
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In the structural block diagram of FIG. 9, the speaker units 35-1, 35-2,... 35- (2 m-1), 35-2 m
have substantially the same specifications, and are attached to the closed cabinet 31, They are
connected in series and parallel in such a combination that the input voltage to the unit is the
same. Therefore, the vibration of each speaker unit is almost the same in any speaker unit. This
means that the vibration of each speaker unit is represented by the vibration of any one speaker
unit, and by using the vibration information of any one speaker unit, the vibration of the other
speaker units Can also be controlled. Therefore, even if the number of speaker units used by
attaching to the common sealed cabinet 31 is increased, the MFB speaker system is configured to
include the vibration sensor 40, the feedback circuit 50, the adder / subtractor 10, and the
power amplifier 20 one by one. It is possible to realize
[0050]
The forms described in FIG. 4, FIG. 5 and FIG. 6 can be applied to the combination of seriesparallel connection of a plurality of speaker units.
[0051]
As described above, according to the sixth embodiment, the speaker units 35-1, 35-2,... 35- (2 m1), 35- (2 m) of substantially the same specifications connected in series and parallel. And a
vibration sensor 40 for detecting vibration information from any one of the speaker units, and a
feedback circuit 50 for generating a feedback signal from the output of the vibration sensor 40;
An adder-subtractor 10 for adding or subtracting a feedback signal output from the feedback
circuit 50 and an input signal input from the outside, and a speaker unit 35 that amplifies the
signal output from the adder-subtractor 10 and is connected in series and parallel. -1, 35-2,... 35(2 m-1), 35-2 m are connected to a common closed cabinet 31. 20 are provided, and therefore,
the present invention is applied to a speaker system having a configuration in which the speaker
units 35-1, 35-2, ... 35- (2 m-1), 35-2 m connected in series and parallel are attached to the
common enclosed cabinet 31. Even in this case, only one vibration sensor 40, one feedback
circuit 50, one adder / subtractor 10, and one power amplifier 20 may be provided, which has
the effect of obtaining an MFB speaker system that can avoid upsizing and complication of the
entire system. .
[0052]
Embodiment 7 FIG.
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16
FIG. 10 is a structural block diagram showing a configuration of the MFB speaker system
according to the seventh embodiment, and shows a case where the MFB speaker system is
applied to a stereo speaker system.
In the figure, 100L is a signal input terminal of the left input signal in the stereo system, 100R is
a signal input terminal of the right input signal, 30-1L, 30-2L,. The cabinets 30-1R, 30-2R,... 30nR are right-handed cabinets having substantially the same volume, and the left-handed and
right-handed cabinets have equal volumes on both the left and right sides. 35-1L, 35-2L,... 35-nL
are attached to the left sealed cabinets 30-1L, 30-2L,. 1R, 35-2R,... 35-nR are right speaker units
mounted in the right-handed sealed cabinets 30-1R, 30-2R,. The specifications of the right
speaker units 35-1R, 35-2R,... 35-nR and the left speaker units 35-1L, 35-2L,.
[0053]
40L is a left vibration sensor for detecting vibration information from any one speaker unit on
the left side, and 40R is a right vibration sensor for detecting vibration information from any one
speaker unit on the right side , 50L is a left feedback circuit (left feedback means) having a gain
.beta.L for controlling a signal output from the left vibration sensor 40L to generate a feedback
signal, and 50R controls a signal output from the right vibration sensor 40R for feedback A right
feedback circuit (right feedback means) having a gain βR for generating a signal, and 10L is a
left adder / subtractor (left feedback for adding or subtracting a feedback signal output from the
left feedback circuit 50L and an input signal on the left) 10R is a right adder / subtractor for
adding or subtracting the feedback signal output from the right feedback circuit 50R and the
input signal on the right (right 20R is a left power amplifier (left feedback means) for amplifying
the signal outputted from the left adder / subtractor 10L and driving the left speaker units 351L, 35-2L, ... 35-nL, 20R Is a right side power amplifier (right side feedback means) for
amplifying the signal output from the right side adder / subtractor 10R and driving the right side
speaker units 35-1R, 35-2R,... 35-nR.
[0054]
A closed speaker system is constituted by a closed cabinet and a speaker unit mounted in the
closed cabinet, and a left speaker system is constituted by a plurality of left closed speaker
systems. The right side speaker system is configured by the plurality of right side closed speaker
systems that are configured.
[0055]
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Next, the operation will be described.
For the left speaker system, the left input signal applied to the signal input terminal 100L is a left
speaker unit 35-1L, 35-2L,... 35- connected in parallel via the left adder / subtractor 10L and the
left power amplifier 20L. Added to nL.
Next, vibration information from any one of the left speaker units 35-1L, 35-2L,... 35-nL is
detected by the left vibration sensor 40L, and the left addition / subtraction is performed via the
left feedback circuit 50L. 10L. The left adder / subtractor 10L combines the left input signal with
the feedback signal that is the output of the left feedback circuit 50L, and the combined signal is
the left for driving the left speaker units 35-1L, 35-2L, ... 35-nL. It is added to the power amplifier
20L. As mentioned above, although the speaker system on the left side was explained, since the
operation about the speaker system on the left side is the same also about the speaker system on
the right side, the explanation about the operation of the speaker system on the right side is
omitted.
[0056]
Also, in the left speaker system, the left speaker units 35-1L, 35-2L,... 35-nL have substantially
the same specifications and are connected in parallel. Furthermore, since the left speaker units
35-1L, 35-2L,... 35-nL are attached to the left sealed cabinets 30-1L, 30-2L,. The input voltage to
each of the speaker units is substantially the same, that is, the vibration of each of the speaker
units is substantially the same in any speaker unit. This means that the vibration of each of the
speaker units is represented by the vibration of any one left speaker unit, and by using the
vibration information of any one left speaker unit, the other left side is used. It is also possible to
control the vibration of the speaker unit. Therefore, even if the number of closed speaker systems
on the left side increases, the left MFB speaker system is configured with one each for the left
vibration sensor 40L, the left feedback circuit 50L, the left adder / subtractor 10L, and the left
power amplifier 20L. It is possible to realize.
[0057]
Further, in the right speaker system, the right speaker units 35-1R, 35-2R,... 35-nR have
substantially the same specifications and are connected in parallel. Furthermore, since the right
enclosed type cabinets 30-1R, 30-2R,... 30-nR having substantially the same volume are installed,
10-05-2019
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input voltages to the speaker units are almost the same, that is, vibration of the speaker units
Units will be almost identical. This means that the vibration of each right speaker unit is
represented by the vibration of any one right speaker unit, and by using the vibration
information of any one right speaker unit, the other right It is also possible to control the
vibration of the speaker unit. Therefore, even if the number of closed speaker systems on the
right side increases, the MFB speaker system on the right side is configured with one each for the
right vibration sensor 40R, the right feedback circuit 50R, the right adder / subtractor 10R, and
the right power amplifier 20R. It is possible to realize.
[0058]
Further, since the volumes of the left and right closed cabinets and the specifications of the
speaker units shown in FIG. 10 are substantially the same, the operations regarding the left and
right speaker systems are substantially the same. Therefore, the left and right signals are
reproduced in a well-balanced manner.
[0059]
Although the speaker unit connection method in FIG. 10 is shown by connecting both the left
speaker unit and the right speaker unit in parallel, if the same connection method is applied to
the left speaker unit and the right speaker unit, series connection is used. Of course, connection
or series-parallel connection may be used. However, in the case of series-parallel connection, it is
necessary that the input voltage to each speaker unit be the same for both left and right.
[0060]
As described above, in the seventh embodiment, the left and right speaker systems having
substantially the same specifications and the same volume are provided by arranging the left and
right speaker systems in which the speaker systems using a plurality of closed type speaker
systems in combination are used. A left vibration sensor 40L for detecting vibration information
from any one of the left and right speaker systems, using a speaker unit and an enclosed cabinet,
and any one of the right speaker units Right side vibration sensor 40R for detecting vibration
information from the left side, left side feedback circuit 50L for generating left side feedback
signal from output of left side vibration sensor 40L, and right side feedback circuit 50R for
generating right side feedback signal from output of right side vibration sensor 40R, The
feedback signal output from the left feedback circuit 50L and the input signal on the left are
added Is amplified by the left adder / subtractor 10L for subtraction, the right adder / subtractor
10-05-2019
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10R for adding or subtracting the feedback signal output from the right feedback circuit 50R and
the input signal to the right, and the signal output from the left adder / subtractor 10L Since the
left power amplifier 20L for driving the left speaker system and the right power amplifier 20R
for amplifying the signal output from the right adder / subtractor 10R to drive the right speaker
system are respectively provided, the left and right speakers Even if multiple closed speaker
systems are used in the system, the left and right speaker systems should be equipped with one
vibration sensor, one feedback circuit, one adder / subtractor, and one power amplifier,
respectively. In this case, an MFB speaker system can be obtained that can avoid upsizing or
complication of the entire system. There is that effect.
[0061]
Embodiment 8
FIG. 11 is a structural block diagram showing the configuration of the MFB speaker system of the
eighth embodiment. In FIG. 11, the same or corresponding portions as in FIG. While the MFB
speaker system of the seventh embodiment is a combination of a plurality of closed speaker
systems on both the left and right sides, in the eighth embodiment, the left speaker unit and the
right speaker unit are attached to the common closed cabinet, respectively. The left speaker
system and the right speaker system are different, and the left speaker unit and the right speaker
unit are similar to those of the seventh embodiment in connection configuration of each speaker
unit. . In FIG. 11, 30L is a left side sealed cabinet, and 30R is a right side closed cabinet.
[0062]
Next, the operation will be described. First, the left speaker system will be described. The input
signal applied to the input terminal 100L is a left speaker unit 35-1L, 35-2L,... 35- connected in
parallel via the left adder / subtractor 10L and the left power amplifier 20L. Added to nL. Next,
vibration information from any one left speaker unit of the left speaker units 35-1L, 35-2L,... 35nL is detected by the left vibration sensor 40L, and the feedback as the output of the left
feedback circuit 50L The signal is fed back to the left side adder / subtractor 10L. The left adder
/ subtractor 10L combines the left input signal with the feedback signal which is the output of
the left feedback circuit 50L, and the combined signal is used to drive the left speaker units 351L, 35-2L,... 35-nL. It is added to the left power amplifier 20L. The above operation is the same
for the right speaker system.
10-05-2019
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[0063]
The left speaker units 35-1L, 35-2L,... 35-nL have substantially the same specifications and are
connected in parallel, and these left speaker units are all in the common left sealed cabinet 30L.
Being attached, the input voltage to each left speaker unit is substantially the same, that is, the
vibration of each left speaker unit is almost the same in any speaker unit. This means that the
vibration of each left speaker unit is represented by the vibration of any one speaker unit, and by
using the vibration information of any one left speaker unit, the other left speakers are used. It
also becomes possible to control the vibration of the unit. Therefore, even if the number of left
speaker units used for the left speaker system increases, it suffices to provide one each of left
vibration sensor 40L, left feedback circuit 50L, left adder / subtractor 10L, and left power
amplifier 20L. It is possible to avoid upsizing and complication of the entire speaker system on
the left side.
[0064]
Next, in the right speaker system, the right speaker units 35-1R, 35-2R,... 35-nR have
substantially the same specifications and are connected in parallel. Furthermore, since these right
side speaker units 35-1R, 35-2R,... 35-nR are all attached to the common right side sealed cabinet
30R, input voltages to the respective right side speaker units are substantially the same, that is,
each right side speaker unit The vibration of each speaker unit is almost the same. This means
that the vibration of each right speaker unit is represented by the vibration of any one speaker
unit, and by using the vibration information of any one right speaker unit, the other right
speakers are used. It also becomes possible to control the vibration of the unit. Therefore, even if
the number of right speaker units used for the right speaker system increases, it is sufficient to
provide one each of the right vibration sensor 40R, the right feedback circuit 50R, the right
adder / subtractor 10R, and the right power amplifier 20R. There is an effect that an MFB
speaker system capable of avoiding upsizing and complication of the entire system can be
obtained for the right speaker system.
[0065]
As for the left and right speaker systems shown in FIG. 11, the volumes of the left sealed cabinet
30L and the right sealed cabinet 30R are substantially the same, and the left speaker units 35-1L,
35-2L,. Since the specifications of 35-nL and right speaker units 35-1R, 35-2R,... 35-nR are
10-05-2019
21
almost the same, the operations regarding the left and right speaker systems are also almost the
same. Therefore, the left and right input signals are reproduced in a well-balanced manner.
[0066]
Although the speaker unit connection method shown in FIG. 11 is shown by connecting both the
left and right speaker units in parallel, if the same connection method is used for the left speaker
unit and the right speaker unit, series connection is used. Of course, connection or series-parallel
connection may be used. However, in the case of series-parallel connection, it is necessary that
the input voltage to each speaker unit be the same on both the left and right sides.
[0067]
As described above, according to the eighth embodiment, the left and right speaker units are
provided with the speaker system having the configuration in which the plurality of speaker units
are provided in one closed cabinet. Any one of the left speaker units using a speaker unit of
substantially the same specification and a closed cabinet of approximately the same volume as
the left side sealed cabinet and the right side closed cabinet and using the left speaker system
and the right speaker system Control signals from the left vibration sensor 40L that detects
vibration information from each, the right vibration sensor 40R that detects vibration
information from any one of the right speaker units, and the left vibration sensor 40L, and
outputs the left feedback signal Left feedback circuit 50L for generating, right vibration sensor
40 Right feedback circuit 50R for controlling the signal from the left side to generate the right
feedback signal, left adder / subtractor 10L for adding or subtracting the feedback signal output
from the left feedback circuit 50L and the input signal, right feedback circuit 50R A left adder /
subtractor 10R for adding or subtracting a feedback signal output from the input signal and an
input signal, a left power amplifier 20L for amplifying a signal output from the left adder /
subtractor 10L and driving a left speaker system, a right adder / subtractor 10R The right power
amplifier 20R is provided to amplify the signal output from the right side and drive the speaker
system on the right side. Therefore, even if a plurality of speaker units are used for the left
speaker system and the right speaker system, one vibration sensor, one feedback circuit, one
adder / subtractor, and one power amplifier may be provided for both left and right sides. There
is an effect that an MFB type speaker system capable of avoiding upsizing and complication of
the entire system can be obtained.
[0068]
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22
Embodiment 9 FIG. 12 is a structural block diagram showing a configuration of the MFB speaker
system of the ninth embodiment. In FIG. 12, the same or corresponding portions as in FIG. In the
figure, 41 is a vibration sensor for detecting vibration information from any one speaker unit of
the left and right speaker systems, and 53 is a vibration sensor 41 common to the left speaker
system and the right speaker system. A feedback circuit common to the left and right speaker
systems for controlling the output signal and generating a feedback signal.
[0069]
Next, the operation will be described. In the left speaker system, the left input signal applied to
the signal input terminal 100L is a left speaker unit 35-1L, 35-2L,... 35-nL connected in parallel
via the left adder / subtractor 10L and the left power amplifier 20L. Added to Next, vibration
information of any one of the left speaker units 35-1L, 35-2L,... 35-nL and the right speaker units
35-1R, 35-2R,. It is detected by the sensor 41 and is fed back to the left side adder / subtractor
10L through the feedback circuit 53. The left adder / subtractor 10L combines the left input
signal and the feedback signal output from the feedback circuit 53, and the combined signal is
used to drive the left speaker units 35-1L, 35-2L,... 35-nL. It is added to the left power amplifier
20L.
[0070]
In the speaker system on the right side, the input signal on the right side applied to the signal
input terminal 100R is synthesized with the feedback signal output from the feedback circuit 53
in the right side adder / subtractor 10R and is connected in parallel via the right side power
amplifier 20R. The right side speaker units 35-1R, 35-2R,... 35-nR are added.
[0071]
The left speaker units 35-1L, 35-2L,... 35-nL have substantially the same specifications and are
connected in parallel.
Furthermore, since they are attached to the left side enclosed cabinet of substantially the same
volume, the input voltage to each left speaker unit is almost the same, that is, the vibration of
each speaker unit is almost the same in any speaker unit.
10-05-2019
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[0072]
The right speaker units 35-1R, 35-2R,... 35-nR have substantially the same specifications and are
connected in parallel. Furthermore, since they are attached to the right side enclosed cabinet of
substantially the same volume, the input voltage to each speaker unit is almost the same, that is,
the vibration of each speaker unit is almost the same in any speaker unit.
[0073]
Furthermore, in this ninth embodiment, the specifications and sealing of each speaker unit are
both left speaker unit 35-1L, 35-2L,... 35-nL and right speaker unit 35-1R, 35-2R,. The volumes
of the mold cabinets are nearly identical. Therefore, the vibration of each speaker unit including
the left side and the right side is represented by the vibration of any one speaker unit on the left
side and the right side if the input signal on the left side and the input signal on the right side are
the same. By using the vibration information of one speaker unit, it is possible to control the
vibration of the other speaker units on the left and right sides. Therefore, even if the number of
left and right sealed speaker systems increases, the vibration sensor 41 and feedback circuit 53
common to the left and right speaker systems are provided, and the left adder / subtractor 10L,
the right adder / subtractor 10R, and the left power By providing the amplifier 20L and the right
power amplifier 20R, it is possible to realize an MFB speaker system.
[0074]
The left input signal is supplied to the left speaker system, the right input signal is a stereo signal
supplied to the right speaker system, and the left input signal and the right input signal are not
identical. However, for the bass component of the stereo signal, the left and right input signals
are often the same signal. Therefore, as a part of the control function of the feedback circuit 53, a
low pass filter for extracting the bass component of the signal from the vibration sensor 41 is
provided. By configuring in this way, it is possible to use vibration information of any one
speaker unit on the left and right sides with respect to the bass range component, and it is also
possible to control the vibration of other speaker units on the left and right sides. It becomes.
Therefore, by providing a low pass filter as a part of the control function of the feedback circuit
53, even if the number of closed speaker systems on the left and right sides increases, one
vibration sensor 41 common to the left and right sides is used for vibration sensors. It is
10-05-2019
24
sufficient to provide a left side adder system 10L and a left side power amplifier 20L for the
speaker system on the left side, and a right side adder system 10R and a right side power
amplifier 20R for the speaker system on the right side. It is possible to realize an MFB speaker
system capable of efficiently expanding the reproduction frequency band in the sound range.
[0075]
In the ninth embodiment, the left and right side speaker units are connected in parallel on both
the left and right sides, but if the left and right sides use the same connection method, they are
connected in series. Of course, connection or series-parallel connection may be used. However, in
the case of series-parallel connection, the input voltage to each speaker unit needs to be the same
on both the left and right sides.
[0076]
As described above, according to the ninth embodiment, speaker systems using a plurality of
closed type speaker systems in combination are disposed on the left and right sides, and
speakers of the same volume and volume with substantially the same specifications on both the
left and right sides. Use a unit and a closed cabinet. A feedback including a vibration sensor 41
for detecting vibration information from any one of the left and right speaker units and a low
pass filter for controlling a signal from the vibration sensor 41. A left adder / subtractor 10L and
a right adder / subtractor 10R for adding or subtracting the signal output from the feedback
circuit 53 and the left input signal or the right input signal, and a left adder / subtractor 10L A
left power amplifier 20L for amplifying a signal to drive a left speaker system and a right power
amplifier 20R for amplifying a signal output from the right adder-subtractor 10R to drive a right
speaker system are provided. As a result, even if a plurality of closed speaker systems are used
on the left and right sides, the vibration sensor and feedback circuit need only have one vibration
sensor 41 and one feedback circuit 53 common to the left and right sides, and further, the left
side The speaker system applicable to the stereo system only by providing one each of the left
adder / subtractor 10L and the left power amplifier 20L for the speaker system and the right
adder / subtractor 10R and the right power amplifier 20R for the speaker system on the right
There is an effect that an MFB speaker system suitable for efficiently expanding the reproduction
frequency band in the above can be obtained.
[0077]
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25
Embodiment 10 FIG. 13 is a structural block diagram showing the configuration of the MFB
speaker system of the tenth embodiment. The same reference numerals as in FIG. 11 denote the
same or corresponding parts in FIG. In the figure, 42 is a vibration sensor common to the left and
right speaker systems for detecting vibration information from any one of the speaker units of
the left and right speaker systems, and 54 is a vibration sensor 42 A feedback circuit common to
the left and right speaker systems that controls the output signal and generates a feedback
signal.
[0078]
Next, the operation will be described. For the left speaker system, the left input signal applied to
the signal input terminal 100L is a left speaker unit 35-1L, 35-2L,... 35- connected in parallel via
the left adder / subtractor 10L and the left power amplifier 20L. Added to nL. Next, vibration
information from the left speaker unit 35-1L, 35-2L,... 35-nL or the right speaker unit 35-1R, 352R,. The feedback signal detected at 42 and generated by the feedback circuit 54 is fed back to
the left adder / subtractor 10L. The left adder / subtractor 10L combines the left input signal and
the feedback signal output from the feedback circuit 54, and the combined signal is the left
power for driving the left speaker units 35-1L, 35-2L,... 35-nL. It is added to the amp 20L.
[0079]
In the right speaker system, the right input signal applied to the signal input terminal 100R is
synthesized with the feedback signal output from the feedback circuit 54 in the right addersubtractor 10R, and the right input amplifier 100R is transmitted through the right power
amplifier 20R. , And 35-nR connected in parallel.
[0080]
As in the eighth embodiment, the left speaker units 35-1L, 35-2L,... 35-nL have substantially the
same specifications and are connected in parallel.
Furthermore, since these left speaker units 35-1L, 35-2L,... 35-nL are attached to the common
left sealed cabinet 30L, the input voltage to each speaker unit is almost the same, that is, the
vibration of each speaker unit All speaker units are almost identical.
10-05-2019
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[0081]
The right side speaker units 35-1R, 35-2R,... 35-nR have substantially the same specifications and
are connected in parallel. Furthermore, since these speaker units are attached to the common
right-hand side sealed cabinet 30R, the input voltage to each speaker unit is almost the same,
that is, the vibration of each speaker unit is almost the same in any speaker unit.
[0082]
Furthermore, since the specifications of the speaker units of the left and right speaker systems
and the volume of the enclosed cabinet are almost the same, the vibration of each speaker unit
for both the left and right sides is the input signal on the left and the input signal on the right. If
it is the same, it will be represented by the vibration of any one speaker unit, and by using the
vibration information of this one speaker unit, the vibrations of the other speaker units on the
left and right sides are in common. It becomes possible to control. Therefore, even if the number
of left and right speaker units increases, it is only necessary to provide one vibration sensor 42
and one feedback circuit common to the left and right, and for the left speaker system, By
providing the left adder / subtractor 10L and the left power amplifier 20L and providing the
right adder / subtractor 10R and the right power amplifier 20R for the right speaker system, an
MFB speaker system applicable to a stereo system can be realized.
[0083]
Also in the tenth embodiment, the low frequency band component of the stereo signal often has
almost the same signal on the left side and the right side, so a part of the control function of the
feedback circuit 54 is the same as the ninth embodiment. A low pass filter for extracting the bass
component of the signal output from the vibration sensor 42 is provided, and the vibration
information of any one speaker unit on the left and right sides can be used as the bass
component.
[0084]
Therefore, even if the number of speaker units used for the left and right speaker systems is
increased by providing a low pass filter as a part of the control function of the feedback circuit
54, the left and right speaker systems are also provided. Even if the number increases, one
common vibration sensor 42 and one feedback circuit 54 are provided on the left and right sides,
and for the adder / subtractor and power amplifier, the left adder / subtractor 10L for the left
10-05-2019
27
speaker system and the left By providing one power amplifier 20L, one right adder / subtractor
10R for the right speaker system, and one right power amplifier 20R, it is possible to efficiently
expand the reproduction frequency band particularly applicable to the bass range, which is
applicable to the stereo system. There is an effect that a suitable MFB speaker system can be
obtained.
[0085]
As to the method of connecting the speaker units in the tenth embodiment, if the same
connection method is used for the left and right speaker systems as in the ninth embodiment,
series connection is also possible in series connection. It goes without saying that connection
may be made, and in the case of series-parallel connection, it is necessary that the input voltage
to each speaker unit be the same on both the left and right sides.
[0086]
As described above, according to the tenth embodiment, the speaker system having a
configuration in which a plurality of speaker units are attached to a common closed cabinet is
disposed on the left and right, and speakers having substantially the same specifications on both
left and right sides. Use the unit.
A feedback circuit including a vibration sensor 42 for detecting vibration information from any
one of the left speaker unit and the right speaker unit and a low pass filter for controlling a
signal output from the vibration sensor 42. 54, the left adder / subtractor 10L and the right
adder / subtractor 10R for adding or subtracting the feedback signal output from the feedback
circuit 54 and the left input signal or the right input signal, and the signal output from the left
adder / subtractor 10L A left power amplifier 20L for amplifying and driving the left closed
speaker system and a right power amplifier 20R for amplifying a signal outputted from the right
adder / subtractor 10R and driving the right closed speaker system are provided.
For this reason, even if a plurality of speaker units are used in the left and right speaker systems,
one vibration sensor and one feedback circuit may be provided, and the left adder / subtractor
10L and the left power amplifier 20L for the left speaker system. , It is possible to apply the
stereo system only by providing one right side adder / subtractor 10R and one right side power
amplifier 20R for the speaker system on the right side, which is suitable for efficiently expanding
the reproduction frequency band particularly in the bass range. There is an effect that an MFB
speaker system can be obtained.
10-05-2019
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[0087]
As described above, according to the present invention, a wiring structure having a plurality of
speaker units mounted in a closed cabinet and having the same input voltage to each of the
speaker units is the same. With respect to the speaker system to which each of the speaker units
of the specification is connected, vibration information of one of the speaker units is detected by
a vibration sensor, and the detected vibration information is input side of the speaker system by
feedback means. Since the feedback processing is performed on the input signal to the speaker
system according to the vibration information, the vibration sensor and the feedback means may
be provided for each of the speaker system. Even if the number of speaker units increases, the
number of vibration sensors and feedback means can be minimized, and the size and complexity
are increased. There is an effect that can be avoided.
[0088]
According to the present invention, the speaker system has a structure in which the speaker units
connected by the connection structure in which the input voltage is the same as the other
speaker units are mounted in independent closed cabinets of the same volume. Since the speaker
system is configured as described above, it is sufficient to provide one vibration sensor and one
feedback means for the speaker system having a structure in which each speaker unit is mounted
in an independent enclosed cabinet of the same volume. Even if it increases, the number of
vibration sensors and feedback means can be minimized, and an increase in size and complexity
can be avoided.
[0089]
According to the present invention, the speaker system is configured to have a structure in which
the speaker units connected by the connection structure in which the input voltage is the same
as the other speaker units are attached in the common closed cabinet. Therefore, it is sufficient to
provide one vibration sensor and one feedback means for the speaker system having a structure
in which each speaker unit is mounted in a common closed cabinet, and even if the number of
speaker units used increases, the vibration sensor In addition, the number of feedback means can
be minimized, and the increase in size and complexity can be avoided.
[0090]
According to the present invention, the left speaker in which the left speaker units connected
with the same wire connection structure as the left speaker unit are mounted in the left sealed
cabinet of the same volume independently. A system and a right speaker system in which the
right speaker units connected by the same wire connection structure as the other right speaker
10-05-2019
29
units are mounted in independent right-handed sealed cabinets of the same volume. Since it is
configured, even when the MFB speaker system is applied to a stereo system, a stereo system of
the speaker system on the left side and the speaker system on the right side of the structure in
which each speaker unit is mounted in an independent enclosed cabinet of the same volume
Vibration even if the number of speaker units increases The number of capacitors and a feedback
means can be configured with minimal, large, there is an effect of avoiding complication.
[0091]
According to the present invention, the left speaker system in which the left speaker units
connected in the same wire connection structure as the other left speaker units are mounted in
the common left sealed cabinet, and the input Since the right speaker unit is mounted in the
common right-hand side sealed cabinet with each right speaker unit connected in the same
wiring structure as the other right speaker units, the MFB speaker system is configured. Even
when applied to the stereo system, the number of speaker units increases in the stereo system of
the left speaker system and the right speaker system in which each speaker unit is mounted in
the common left and right sealed cabinets respectively Even if the number of vibration sensors
and feedback means is minimized Can be formed, large in size, there is an effect that can be
prevented from being complicated.
[0092]
According to the present invention, the specifications of the left speaker unit and the right
speaker unit, and the volumes of the left sealed cabinet and the right sealed cabinet are
equalized. Even if it increases, the number of vibration sensors and feedback means can be
minimized, and an increase in size and complexity can be avoided.
[0093]
According to the present invention, the left vibration sensor for detecting vibration information
of one of the left speaker units constituting the left speaker system, and the right speaker units
constituting the right speaker system A right vibration sensor for detecting vibration information
of one of the right speaker units and vibration information detected by the left vibration sensor is
returned to the input side of the left speaker system, and an input signal to the left speaker
system On the other hand, the left feedback means for performing feedback processing by the
vibration information, and the vibration information detected by the right vibration sensor are
returned to the input side of the speaker system on the right, and the vibration with respect to
the input signal to the speaker system on the right Since the right side feedback means for
performing feedback processing by information is provided, M Even when the B speaker system
is applied to the stereo system, the left vibration sensor is provided for each of the left speaker
system and the right speaker system in a structure in which each speaker unit is mounted in an
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independent enclosed cabinet of the same volume. And the left side feedback means, the right
side vibration sensor and the right side feedback means only one by one, and even if the number
of speaker units increases in the stereo system, the number of vibration sensors and feedback
means can be minimized and the size increases Has the effect of avoiding complication.
[0094]
According to the present invention, the left side and the right side detecting the vibration
information of one of the left speaker units constituting the left speaker system or the right
speaker units constituting the right speaker system are detected. The vibration sensor common
to the speaker system and the vibration information common to the left and right speaker
systems detected by the vibration sensor are returned to the input side of the left speaker system
and the right speaker system, and the left speaker system And feedback means for feedback
processing based on the vibration information on the input signal to the speaker system on the
right side, and feedback means having a feedback circuit common to the speaker systems on the
left side and the right side. Applied to the stereo system Even if the left and right speaker
systems have vibration sensors and feedback means in common, the number of vibration sensors
and feedback means can be minimized even if the number of speaker units increases in a stereo
system There is an effect of being able to avoid the increase in size and complexity.
[0095]
According to the present invention, since the speaker units are connected in a parallel connection
structure in which the input voltage is the same as that of the other speaker units, even if the
number of speaker units to be used increases, Since the input voltage of each speaker unit is the
same, the vibration information may be detected from one of the speaker units, the number of
vibration sensors and feedback means can be minimized, and the size and complexity are
increased. There is an effect that can be avoided.
[0096]
According to the present invention, since the speaker units are connected in a series connection
structure in which the input voltage is the same as that of the other speaker units, the number of
speaker units to be used is increased even if the number of speaker units is increased. Since the
input voltage of each speaker unit is the same, the vibration information may be detected from
one of the speaker units, the number of vibration sensors and feedback means can be minimized,
and the size and complexity are increased. There is an effect that can be avoided.
[0097]
According to the present invention, since the speaker units are connected in a series-parallel
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connection structure in which the input voltage is the same as other speaker units, even if the
number of speaker units used increases, Since the input voltage of each of the speaker units is
the same, the vibration information may be detected from one of the speaker units, and the
number of vibration sensors and feedback means can be minimized, which leads to an increase in
size and complexity. There is an effect that can be avoided.
[0098]
According to the present invention, the input voltage to each speaker unit is equal between the
left speaker unit, between the right speaker unit, and between the left speaker unit and the right
speaker unit. Since the left speaker unit and the right speaker unit are connected in parallel, even
if the number of speaker units used in the stereo system increases, the input signal common to
the left and right speaker systems in the left speaker unit and the right speaker unit Since the
input voltage of each speaker unit is the same, the number of vibration sensors and feedback
means can be minimized, and an increase in size and complexity can be avoided.
[0099]
According to the present invention, the input voltage to each speaker unit is the same between
the left speaker unit, between the right speaker unit, and between the left speaker unit and the
right speaker unit. Since the left speaker unit and the right speaker unit are connected in series,
even if the number of speaker units used in the stereo system increases, the input signal common
to the left and right speaker systems in the left speaker unit and the right speaker unit Since the
input voltage of each speaker unit is the same, the number of vibration sensors and feedback
means can be minimized, and an increase in size and complexity can be avoided.
[0100]
According to the present invention, the input voltage to each speaker unit is the same between
the left speaker unit, between the right speaker unit, and between the left speaker unit and the
right speaker unit. Since the left speaker unit and the right speaker unit are connected in series
and in parallel, even if the number of speaker units used in the stereo system increases, the left
speaker unit and the right speaker unit have inputs common to the left and right speaker systems
Since the input voltage of each of the speaker units is the same for signals, the number of
vibration sensors and feedback means can be minimized, and an increase in size and complexity
can be avoided.
[0101]
Brief description of the drawings
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[0102]
FIG. 1 is a structural block diagram showing a configuration of an MFB speaker system according
to a first embodiment of the present invention.
[0103]
FIG. 2 is a structural block diagram showing a configuration of an MFB speaker system according
to a second embodiment of the present invention.
[0104]
FIG. 3 is a structural block diagram showing a configuration of an MFB speaker system according
to a third embodiment of the present invention.
[0105]
FIG. 5 is a connection diagram showing a connection configuration when four speaker units are
used in an MFB speaker system according to a third embodiment of the present invention.
[0106]
FIG. 5 is a connection diagram showing a connection configuration when six speaker units are
used in an MFB speaker system according to a third embodiment of the present invention.
[0107]
FIG. 6 is a connection diagram showing a connection configuration when eight speaker units are
used in an MFB speaker system according to a third embodiment of the present invention.
[0108]
FIG. 7 is a structural block diagram showing a configuration of an MFB speaker system according
to a fourth embodiment of the present invention.
[0109]
FIG. 8 is a structural block diagram showing a configuration of an MFB speaker system according
to a fifth embodiment of the present invention.
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[0110]
FIG. 9 is a structural block diagram showing a configuration of an MFB speaker system according
to a sixth embodiment of the present invention.
[0111]
FIG. 10 is a structural block diagram showing a configuration of an MFB speaker system
according to a seventh embodiment of the present invention.
[0112]
FIG. 11 is a structural block diagram showing the configuration of an MFB speaker system
according to an eighth embodiment of the present invention.
[0113]
FIG. 12 is a structural block diagram showing a configuration of an MFB speaker system
according to a ninth embodiment of the present invention.
[0114]
FIG. 13 is a structural block diagram showing a configuration of an MFB speaker system
according to a tenth embodiment of the present invention.
[0115]
FIG. 14 is a circuit block diagram showing a configuration example of a conventional MFB
speaker system.
[0116]
FIG. 15 is a structural block diagram showing a conventional MFB speaker system.
[0117]
FIG. 16 is a structural block diagram showing a configuration example of a conventional MFB
speaker system using a plurality of speaker units.
[0118]
Explanation of sign
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[0119]
10 adder-subtractor (feedback unit), 10L left-side adder-subtractor (left-side feedback unit), 10R
right-side adder-subtractor (right-side feedback unit) 20 power amplifier (feedback unit), 20L
left-side power amplifier (left-side feedback unit), 20R right-side power amplifier (Right side
return means), 30, 30-1, 30-2 ... 31, 31 enclosed type cabinet, 30L, 30-1L, 30-2L ... Left enclosed
type cabinet, 30R, 30-1R, 30-2R ... Right enclosed type Cabinet, 35-1, 35-2 ... speaker unit, 35-1L,
35-2L ... left speaker unit, 35-1R, 35-2R ... right speaker unit, 40, 41, 42 vibration sensor, 40L
left vibration sensor, 40R right side vibration sensor, 50 feedback circuit (feedback means), 50L
left side feedback circuit (left side feedback means), 50R right side feedback Road (right feedback
means), 53, 54 left and right speaker systems common feedback circuit.
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