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JPH0357399

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DESCRIPTION JPH0357399
[0001]
TECHNICAL FIELD The present invention relates to a nubica system used as an indoor / outdoor
sound reproducing device. 2. Related Art In recent years, due to the tendency of lightness,
thinness, and smallness, a speaker that does not require much installation area has been
developed. Among them, there is a speaker system that reproduces a low distortion and plane
wave sound field by reducing the depth and increasing the diaphragm area. Hereinafter, the
conventional speaker system as described above will be described with reference to the
drawings. FIG. 6 is a perspective view showing an example of a speaker system. In FIG. 8, 1 is a
cabinet, 2a and 2b are low range speakers, and 3 is a middle to high range speaker. The low
range speakers 2 a and 2 b and the middle and high range speaker 3 are fixed to the cabinet 1.
FIG. 7 is a circuit diagram showing a signal path of a conventional speaker network. 4 is an input
terminal, 6 is a circuit diagram of a basic network, 6 is a high range speaker, 7 is a middle range
speaker, and 8a and 8b are low range speakers. The input of the network 6 is connected to the
input terminal 4. Nupikas 6, 7, 8a, 9b are connected to the output end of the netowork 6. The
operation of the speaker system configured as described above will be described below. The AC
electrical signal input to the input terminal 4 is input to the network 5 and demultiplexed. The
output end of the network 6 is connected with a speaker suitable for reproducing a signal
separated for each frequency band, and the sound is emitted from these speakers. At this time,
each element constant of the network 6 is determined according to the impedance of the speaker
connected to the output end and the cut-off frequency. Problems to be Solved by the Invention
However, in the configuration as described above, the sound quality may be degraded due to the
change in sound pressure frequency characteristics before and after the Nakashiro and low
frequency crossover frequency caused by the installation location of the speaker system. The In
order to avoid this, it was necessary to locate an appropriate position and install a speaker.
SUMMARY OF THE INVENTION In view of the above-described problems, the present invention
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provides a speaker network capable of easily correcting the sound pressure frequency
characteristics in the low frequency range so as not to deteriorate the sound quality of the
speaker installed at an arbitrary position. Means for Solving the Problem In order to achieve this
object, the speaker / sensor of the present invention has two or more types of cutoff frequencies
of the low-pass low-pass finisher, and a switch for selecting and setting them is provided. It can
be switched.
Operation With this configuration, it is possible to prevent deterioration of the sound quality due
to the location of the speaker by changing the cutoff frequency of the low pass filter by
switching. Embodiment An embodiment of the present invention will be described with reference
to the drawings. FIG. 1 is a block diagram of a speaker network according to a first embodiment
of the present invention, and FIG. 2 is a perspective view showing an example of installation of
speakers. In FIG. 1, button 9 is an input terminal, 10 channel middle high band network, 11 is a
first low band network, 12 is a second low band network, 13 switch, 14 is a middle high band
speaker, 16 is a low band speaker It is. In FIG. 2, 16a and 16b are speakers and 17a and 17b are
walls. The middle high band network 10 and the first and second low band networks 11.12 are
connected in parallel to the input terminal 9, and a switch 13 for selecting the network 11.12 is
connected after these networks 11.12. The low frequency speaker 15 is connected to the end of
the middle high frequency speaker 14 at the end and the end of the switch 13. The operation of
the speaker network configured as described above will be described below. As shown in FIG. 2,
when the speaker is close to the wall (a) and the speaker is separated from the wall (b), the sound
pressure frequency characteristics of these are shown in FIG. FIG. When the speaker is brought
close to the wall, the sound pressure at the frequency f1 increases, and the sound balance is
worse than when the speaker is removed from the wall. Therefore, by setting the first low band
network 11 of FIG. 2 lower than the cutoff frequency of the second low band net choke 12 and
switching the switch 13 to the first network 11. , The sound pressure applied to f1 can be
corrected to a good sound of down paranne. The second embodiment of the present invention is
described above with reference to the drawings. FIG. 3 is a block diagram of a loudspeaker
network according to a second embodiment of the present invention, and FIG. 4 is a front view
and a rear view of a loudspeaker system. As shown in FIG. 3, 18 is an input terminal, 19 is a low
range network, 2) is a first middle high band network, 21 21 is a second middle high band
network, 22 is a switch, 23 is a middle high range speaker, 24 Is a low frequency speaker. In FIG.
4, 25a and 25b are low band speakers, 26 is a middle and high band speaker, 27 is a low pass
speaker, 28a and b are low band speaker input terminals, and 29 is an input terminal and a low
band network output terminal.
Low band network 19 at input terminal 18. First and second middle and high frequency
networks 2). 21 are connected in parallel, and these networks 2). 21 after the network 2). A
switch 22 for selecting 21 is connected, and a low band speaker 24 is connected to the end of
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the network 19 and a middle high band speaker 23 is connected to the end of the switch 22. こ
れらのネットワーク. The switch is mounted in a cabinet of middle high frequency speakers,
and the cabinet is externally wired with low frequency speaker input terminals of independent
low frequency speaker cabinets and low frequency network output terminals of middle high
frequency speakers. The operation of the speaker network configured as described above will be
described below. As in the first embodiment, by switching the cut characteristics of the low-cut
filter section of the mid-high range speaker when the speaker is brought close to the wall and
separated from the wall by a switch It can be suppressed and corrected to a well-balanced sound.
As described above, according to the present embodiment, by providing a network with two or
more types of cutoff frequencies and a switch for switching between these metals, it is possible to
easily correct the balance of the sound pressure depending on the installation location of the
speaker . According to the present invention, a speaker network is provided with a low band
network having two or more kinds of cut-off frequencies and a switch for switching the same,
and around the Nakashiro and low band crossover frequency caused by the location of the
speaker It is possible to easily correct the change in sound pressure.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram of a speaker network in a button according to a first embodiment of the
present invention, FIG. 2 is a perspective view showing an example of a location for installation
of the skiby force, and FIG. 3 is a speaker according to the second embodiment. Fig. 4 is a front
view and a back view of the speaker system in the second embodiment, Fig. 5 is a sound pressure
frequency characteristic diagram in Fig. 2, Fig. 6 is an example of the speaker system. FIG. 7 is a
basic circuit diagram of a conventional speaker network.
9 · · · · · · · · · Input terminal, 1 o · · · · · · · · · · · · · · · · · · · · · · · 1st low band network, 12 · · · · · · · 2
second low band network, 13 ...... switch, 14, - ... mid-high range speaker, 16 ... ... low-frequency
Suhika.
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