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JPH05176391

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH05176391
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sound reproducing apparatus, and more particularly to a sound reproducing apparatus capable
of reproducing natural sounds and the like in a narrow closed space such as a room with a threedimensional sound.
[0002]
2. Description of the Related Art Heretofore, there have been sound reproducing apparatuses for
reproducing sound sources such as natural sounds, environmental sounds and music. A stereo
reproduction apparatus is generally known as this sound reproduction apparatus. In recent years,
a large-scale three-dimensional sound reproducing apparatus has been realized in which a threedimensional sound space is formed in order to relax the mind and body and to give a sense of
reality in a large venue for performing various events and events. This three-dimensional sound
reproducing apparatus has a large number of speakers arranged at various places in the hall, and
the position of the speakers is detected so that a viewer (listener) in the sound space formed by
the speakers senses a sound image in three dimensions. Each speaker is operated in
consideration.
[0003]
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1
However, the conventional three-dimensional sound reproducing apparatus that reproduces the
dignity is manufactured on the premise of being installed in a wide place, and can not be easily
moved because the apparatus itself becomes large scale. It will also be very expensive. Therefore,
it can not be used easily in a small space such as a small hall or an individual's room.
[0004]
To reproduce a sound image closer to natural sounds in a small space such as this small venue or
personal room, simulate a 4-channel reproduction method or stereo sound source that operates
speakers arranged two by one before and after the listener. Various attempts have been made,
such as a surround system that converts sound into sound and plays it back.
[0005]
However, such an attempt has not been established as a system yet, and since the sound field is
planar even if a broad acoustic space is formed using a stereo sound source, the listener is threedimensional like natural sound. It is impossible to reproduce the sound as if to feel the sound
image.
[0006]
An object of the present invention is to obtain a sound reproducing apparatus capable of threedimensionally reproducing natural sounds and environmental sounds in a compact manner in
consideration of the above-mentioned facts.
[0007]
SUMMARY OF THE INVENTION In order to achieve the above object, according to the present
invention, at least three movable columns in which a plurality of speakers are built-in along the
length direction, the sound generated from the speakers is It is characterized by comprising a
pillar group in which the pillars are arranged at predetermined intervals so as to intersect
substantially at the same site, and a control device which operates each of the speakers based on
a recorded or stored sound source.
[0008]
According to the invention, the group of columns comprises at least three movable columns, each
of which incorporates a plurality of loudspeakers along the length of the column.
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2
These columns are arranged at predetermined intervals such that sounds generated from the
built-in speakers intersect at substantially the same site.
Thereby, the sound field space which can directly hear the sound of the speaker built in each
pillar is decided.
The controller activates each speaker based on the recorded or stored sound source.
As a result, in the sound field space, the listener can sense three-dimensional sound images in
front, rear, left, right, upper and lower, and can listen to natural sounds and environmental
sounds in three dimensions.
[0009]
Embodiments of the present invention will be described in detail below with reference to the
drawings. A present Example is an example which adapted the three-dimensional sound
reproduction system of this invention to small rooms, such as a listening room.
[0010]
As shown in FIG. 2, a chair 50 is disposed substantially at the center of the listening room 52,
and a listener can sit on the chair 50. The three-dimensional sound reproduction system 10 is
provided with columns 12, 14, 16, 18 as movable column groups, and the columns 12 to 18 are
disposed at the four corners of the listening room 52. Each of the columns 12 to 18 incorporates
a speaker for converting an input electric signal into a sound. That is, the speaker 22U is built in
the upper part of the column 12, and the speaker 22D is built in the lower part, and the direction
of the speakers 22U and 22D crosses the length direction of the column 12. It is preferable that
the speakers 22U and 22D be directed to a listener seated substantially at the center of the
listening room 52. The pillars 12 are arranged such that the sounds generated by the speakers
22U and 22D are directed substantially to the center of the listening room 52.
[0011]
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Similarly, a speaker 24U is incorporated above the column 14, a speaker 24D is incorporated
below, a speaker 26U is incorporated above the column 16, a speaker 26D is incorporated below,
and a speaker 28U is attached above the column 18, below. Has a built-in speaker 28D. Also, the
pillars 14, 16, 18 are arranged so that the sound generated from the speaker built in each pillar
is directed substantially to the center of the listening room 52, similarly to the pillar 12.
[0012]
Each of the above-mentioned speakers is composed of a tweeter for reproducing a high range
and a woofer for reproducing a low range.
[0013]
The upper speakers 22U to 22U and the lower speakers 22D to 22D built in the columns 12 to
18 are connected to a control unit 40 as a control device.
[0014]
As shown in FIG. 1, the control unit 40 includes a digital recorder 42, a DA converter 44, and
amplifiers 32, 34, 36, 38.
Although not shown, the digital recorder 42 can be loaded with a digital tape on which a sound
source such as a natural sound or an environmental sound is digitally recorded.
Further, eight types of sound sources are recorded on the digital tape so as to be read
simultaneously, and the digital recorder 42 independently outputs electrical (digital) signals
corresponding to the eight types of sound sources recorded on the digital tape.
[0015]
The digital recorder 42 is connected to the DA converter 44, and the DA converter 44 converts
an input digital signal into an analog signal. The DA converter 44 consists of eight independent
DA units (eight channels), and can convert an input digital signal into eight independent analog
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signals.
[0016]
The converted analog signals of eight channels are connected to the amplifiers 32, 34, 36, 38
every two channels. Each of the amplifiers 32 to 38 operates such that each of the two channels
operates as an independent power amplifier, and amplifies two weak analog signals to be input
independently at a predetermined amplification factor. Therefore, the eight channels of analog
signals output from the DA converter 44 are output as electrical signals independently amplified
by the amplifiers 32-38.
[0017]
The amplifier 32 is connected to a speaker 22 U installed above the column 12 and a speaker 28
U installed above the column 18. Similarly, the amplifier 34 is connected to the speaker 24 U
installed above the column 14 and the speaker 26 U installed above the column 16. Also, the
amplifier 36 is connected to the speaker 24 D installed below the column 14 and the speaker 26
D installed below the column 16, and the amplifier 38 is connected to the speaker 22 D installed
below the column 12 and below the column 18 Connected to the speaker 28D installed in the
[0018]
The operation of this embodiment will be described below. For example, a digital tape on which
natural sound is digitally recorded is loaded into the three-dimensional sound reproduction
system 10 as a sound source. When the digital tape is reproduced, the digital recorder 42
outputs eight types of digital signals to the DA converter 44. The DA converter 44 converts eight
types of input digital signals into eight channels of analog signals. The converted analog signal is
output to the amplifiers 32, 34, 36, 38. The amplifiers 32, 34, 36, 38 amplify the input analog
signal and output it to the speakers 22U, 22D, 24U, 24D, 26U, 26D, 28U, 28D. The speakers 22U
to 28D generate sounds in response to the input signals.
[0019]
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Here, the process of three-dimensionally reproducing a digital tape on which natural sound is
digitally recorded will be described in detail. In the conventional stereo reproduction, by
arranging speakers at the front left and right of the listener and reproducing the two-channel
sound source, it is possible to form a sound image in the left and right direction. In this way,
stereo reproduction with wide left and right is realized.
[0020]
In the present embodiment, pillars 12 to 18 in which speakers are built up at the top and bottom
are disposed at the four corners of the listening room 52. The wide-ranging reproduction as in
the conventional stereo reproduction is realized by two speakers separated by a distance, and the
three-dimensional-wide three-dimensional reproduction is realized by the speakers built in the
columns 12-18.
[0021]
That is, the speakers 16D and 28D built in the lower part of the pillar 16 and the pillar 18
disposed in front of the listener reproduce the sound source of the two left and right channels,
thereby localization in the left and right direction as in the conventional stereo reproduction.
Form a possible sound image. The same applies to the speakers 26U and 28U built in above the
pillars 16 and 18. On the other hand, when the speakers 26D and 26U and the speakers 28D and
28U built in the upper and lower sides of the column 16 reproduce sound sources of upper and
lower two channels, a sound image which can be localized in the upper and lower direction is
formed.
[0022]
If the speakers 26U and 28U built in the upper part of the pillar 16 and the pillars 18 and the
speakers 26D and 28D built in the lower part respectively reproduce so as to form a sound
image localized at substantially the center in the left-right direction, the listener It can be felt that
the sound image is localized near the approximate center of the pillars 16 and 18 and the
approximate centers of the upper and lower speakers. At this time, the two speakers 26D and
26U built in the upper and lower sides of the pillar 16 and the two speakers 28D and 28U built
in the upper and lower sides of the pillar 18 are regarded as one speaker in the lateral direction
as described above When two speakers are simultaneously controlled so as to form a localizable
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sound image, the sound image localized near the center in front of the listener moves to the left
and right. Similarly, the two speakers 26U and 28U built in the upper part of the pillar 16 and
the pillar 18 and the two speakers 26D and 28D built in the lower part are regarded as one
speaker and localized in the vertical direction as described above When simultaneously
controlling each to form a possible sound image, the sound image localized near the center in
front of the listener moves up and down.
[0023]
Therefore, by reproducing the speakers 26D, 26U, 28D, 28U built in the pillars 16 and 18 in
accordance with the position of the sound image to be localized in front of the listener, the
listener can freely freely in the upper, lower, left, and right The sound image can be localized.
[0024]
Similarly, the sound image can be freely localized over substantially the entire area in the back,
up, down, left, right direction of the listener by the pillars 12 disposed behind the listener and the
speakers 22D, 22U, 24D, 24U incorporated in the pillar 14 .
[0025]
Similarly, in the speakers 22D, 22U, 28D, and 28U incorporated in the pillar 12 and the pillar 18
disposed to the right of the listener, the sound image is freely localized over substantially the
entire up and down direction of the listener's right and left. The speakers 24D, 24U, 26D, and
26U built in the pillar 14 and the pillar 16 disposed on the left side of the listener can freely
localize the sound image over substantially the entire area in the upper, lower, front, and rear
directions of the listener's left. It can be done.
[0026]
Furthermore, in the speakers 22U, 24U, 26U, and 28U built in the upper part of the pillars 12 to
18 as well, the sound image can be localized freely over substantially the entire front, rear, left,
and right direction above the listener. With the speakers 22D, 24D, 26D, 28D built in below the
column 18, the sound image can be localized freely over substantially the entire region in the
front, rear, left, and right directions below the listener.
[0027]
As described above, the listeners in the listening room 52 have sound images in the front, rear,
right, left, up and down directions by the upper speakers 22U to 28U and the lower speakers
22D to 28D built in the pillars 12 to 18 arranged at four locations around the listener. It can be
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reproduced so that it can be perceived in three dimensions.
[0028]
As described above, since the speakers are built in the upper and lower sides of the pillar and this
pillar is arranged at the corner of the listening room 52, there is no need to arrange a special
device for reproducing the three-dimensional sound, and the three-dimensional sound can be
easily Sound reproduction can be realized.
In addition, since the pillars can be made to stand around the listener without a sense of
incongruity, three-dimensional sound can be easily reproduced without providing a special
exterior and interior decoration such as partitioning.
In addition, the movement of each column is easy, and by arranging each column at a specific
position where reproduction of three-dimensional sound is to be realized, the sound field of
three-dimensional sound reproduction can be easily formed.
[0029]
In the above embodiment, although an example in which a three-dimensional sound reproduction
system is realized using four columns is described, the present invention is not limited to four
columns, and three or four columns may be used. You may use a pillar beyond.
[0030]
Further, in the above embodiment, although a case was described where a total of two speakers,
one at the top and one at the top, were used in one column, the present invention is not limited
to this, and three or more speakers are incorporated. You may do it.
[0031]
In the above embodiment, the case where the digital recording tape is reproduced by dividing the
sound source such as natural sound into eight types (eight channels) has been described, but the
present invention is not limited to this, and eight types In the case of operating the built-in
speaker in three columns, six types may be used.
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[0032]
Further, in the above embodiment, an example in the case of using a power amplifier in which
two channels are independent has been described, but an independent amplifier (power
amplifier) may be used for each speaker.
[0033]
As described above, according to the present invention, it is possible to obtain a sound
reproducing apparatus capable of easily reproducing natural sounds and environmental sounds
in a narrow space such as a small hall or a room of an individual. There is an effect of.
[0034]
In addition, since the acoustic space is formed by arranging the pillars incorporating the
speakers, the three-dimensional sound can be easily reproduced without providing any special
decoration such as partitioning as a listening space. It has the effect of being able to
[0035]
Also, since each pillar can be easily moved, the sound of stereophonic sound reproduction can be
obtained by arranging each pillar at a specific position where reproduction of stereophonic
sound is desired to be realized without being limited by the listening place and space of the
listener. There is an effect that the place can be easily formed.
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