JPS52124324

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DESCRIPTION JPS52124324
Among the speaker units installed in a plurality of enclosures of a speaker system, at least one
speaker unit is provided with a delay time circuit for generating at least one delay time, and the
power of the speaker unit in parentheses is provided. A speaker system characterized by having
an equalizer capable of changing at least two types of frequency characteristics.
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker system
including a plurality of speaker units, in which a delay time circuit is provided in a part of the
speaker units. And a speaker system characterized by changing the power frequency
characteristics of the speaker unit provided with the delay time circuit. Conventionally, a plurality
of speaker units installed in one enclosure is driven at the same time with respect to each single
digit, and there is no time difference. When listening to such a speaker system in a normal room,
the time difference between the direct sound from the speaker reaching the listener and the
reflected sound from the wall, floor, ceiling, etc. reaching the listening area depends on the size
of the room Be done. Further, the frequency characteristic of the reflected sound intensity is
different from the characteristic peculiar to the speaker system under the influence of the room
characteristic such as the reverberation time frequency characteristic of the room, and the timbre
of the speaker system changes depending on the room characteristic. On the other hand, in the
speaker system of the present invention, the speaker unit is installed in the oblique direction of
the enclosure, and the speaker unit is provided with a delay circuit, and several types of delays
for signals sent manually to the speaker unit installed in the front direction It is possible to set a
time to select it. Further, the speaker unit provided with the delay time circuit is provided with an
equalizer having a plurality of power frequency characteristics set therein, which makes it
possible to select one of the characteristics. EndPage: 1 In this way, the speaker system of the
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present invention can generate the frequency characteristic sound of the indirect sound delay
time and the indirect sound intensity independently of the size of the room to be used for the f'Lt
cabinet and about custom-made It can be provided to listeners with good sound fJILt almost
independently of room size, custom-made and custom-made. Hereinafter, the present invention
will be described in detail by way of examples. FIG. 1 is an external view of a speaker system
according to the present invention. The figure (G) in the same figure is the figure which looked at
the speaker system upwards, and is a figure seen (8) with a front view. (B) In the figure, the
enclosure 1 is relatively large on the enclosure 1 (/ CzJs) (in a diagonal direction with Zufle plate
3.4 installed, this l ′ ′); Mitsu drains 5, 6 are installed. The enclosure 11 Crt speaker unit
Uono-7 and the tweeter 8 are installed γ. The small sieve plate 3 ° 4 is covered by a
rectangular lid 2 made of saran net.
When installed in a normal room, the Mitsudreuji 5.6, which is installed in a 60 ° oblique
direction with respect to the axis X of the speaker system, reflects mostly from the wall, floor,
ceiling, etc. at the listening position It is for controlling indirect sound. This situation will be
described with reference to FIG. In FIG. 2, in the sound wave radiated from the speaker system of
the present invention installed in the room 9, there is a sound wave d reaching the listening
space lO @ and a sound wave r reflected on the side wall to reach the listening space Do. Since
this reflected wave absorbs energy each time it is reflected, the initial reflected wave such as the
first and second reflections is important as indirect sound in the listening space. The time
difference between direct sound and reflected sound arriving from the speaker system directly to
the listening space is an important factor that gives the listener a sense of the expansion and
depth of the sound field. As the difference in arrival time between direct sound and indirect
sound becomes smaller just after lOm decrease, the above sense of sound field increases, but
when it becomes less than about l o-, the sense of expansion of the sound field is slightly
reduced, It mainly causes changes in the timbre itself. When listening to the playback sound of
the speaker system in a room with 3 to 6 mats, the delay time for the direct sound of the initial
reflection sound to the listener is several m + 1130 in the living body, so the sense of sound field
i, such as a sense of spreading, is weak That's why. Therefore, when listening to the playback
sound in a small room such as 3 to 6 hours, by delaying the initial reflection sound in time, a
hearing effect similar to that in the case where the playback sound is heard in a wider room can
be produced. The speaker system of the present invention produces the above-mentioned
hearing effect. The circuit configuration of the speaker system according to the present invention
will be described with reference to FIG. Referring to FIG. 3, the Mitsudrain system 5 is provided
with an equalizer 11 for power control and a delay time circuit 12 which will be described later.
The Mie drain system 5, 5 and tweeter 8 and Uno-7 are connected n through a dividing network
13. The delay time circuit 12 is constituted by an analog shift register or a circuit configuration
for converting an analog signal into a digital signal and further delaying the signal by the digital
shift register and then converting the digital signal into an analog signal again. It has become.
With such a circuit configuration, it is possible to delay the signal to 30 爪 a, 50 frle C and 3
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types to 10 claws, and one type can be selected by the changeover switch.
Further, the above-described arrow response control equalizer 11 has a function to be described
below. FIG. 4 is a diagram showing the reverberation time frequency custom-made in a general
room. Characteristic curves a and b are typical characteristic curves found in ordinary rooms. a is
a characteristic curve having a middle frequency VC & a peak and b is a substantially flat
characteristic curve. If there is a peak of reverberation time in the middle frequency, the indirect
sound in this frequency range must be present in the room for a longer time than the indirect
sound in the other frequency range at K, and the reproduction sound quality is weighted at the
middle frequency It will be In contrast to this, the indirect sound component of the reproduction
sound quality is provided by giving a characteristic having a dip at a mid frequency such as curve
a 'in FIG. You can take a lance. For the curve-like reverberation-time frequency segment shown in
FIG. 4, the frequency of the percussive noise generated by Parsungri by setting the second end to
the curve b 'of the fifth failure. e-Ff note can be realized. By processing the power response
control circuit 11i as described above, it is possible to control 0 company of indirect sound
affected by the room characteristic to a good state. Next, the power frequency characteristic & 4
of the speaker system of the present invention will be described with reference to FIG. In FIG. 6,
the custom-made curve C is a Bowerns response #g released over the entire space created by
Woher-7 and tweeter 8. This is one of the power responses generated by the song & b'i dust
removal 5.6. The power response obtained by combining both characteristics is almost flat at the
mid frequency.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view of a speaker system
according to the present invention. FIG. 2d shows the relationship between direct sound and
indirect sound in the listening space when the speaker system of the present invention is
installed indoors. Fig. J Y Required in the circuit diagram of the loudspeaker system of the
present invention. FIG. 4 is a view showing a typical example of the reverberation time
candlestick number characteristic in the passage. FIG. 5 vi is a diagram showing the power
frequency characteristic of the Mitsu drain in the speaker system of the present invention. FIG. 6
is a diagram showing a word-per-minute urine note of the speaker system of the present
invention. 竿 12 12 garden 5 笥 EndPage: 3 Continued on page 1 0 Inventor Yoshihara Ishihara
Toyokawa City No. 9 in front of Shirakawa-cho No. 5 Hitachi Ltd. Toyokawa Factory 124EndPage: 4
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