JPH05176391A - Acoustic reproducing device - Google Patents

Abstract

PURPOSE:To obtain an acoustic reproducing device capable of stereo-phonically reproducing a natural sound or an environment sound by a compact size. CONSTITUTION:Poles 12, 14, 16, 18 to be moved are arranged on the four corners of a listening room 52. Speakers 2U to 28U and speakers 22D to 28D are respectively built in the upper parts of the poles 12 to 18 and lower parts of them. Respective poles are arranged so that sounds generated from the speakers are directed to the approximate center of the room 52. Respective speakers 22U to 28U, 22D to 28D are connected to a control unit 40. The unit 40 is provided with a digital recorder 42, a D/A converter 44 and amplifiers 2, 34, 36, 38 and outputs a digital signal read out from a digital tape by the. digital tape recorder 42 to the speakers 22U to 28U, 22D to 28D through the D/A converter 44 and the amplifiers 32 to 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing device, and more particularly to a sound reproducing device capable of reproducing a natural sound or the like as a three-dimensional sound in a narrow closed space such as a room.

[0002]

2. Description of the Related Art Conventionally, there is a sound reproducing apparatus for reproducing a sound source such as a natural sound, an environmental sound and music. As this sound reproducing device, a stereo reproducing device is generally known. In recent years, a large-scale stereophonic sound reproducing device has been realized which forms a stereoscopic sound field space in order to relax the mind and body and provide a realistic sensation in a wide venue for various entertainments and events. This stereophonic sound reproducing apparatus arranges a large number of speakers at various places in the venue so that the position of the speakers can be stereoscopically sensed by a viewer (listener) in the acoustic space formed by these speakers. Considering this, each speaker is operated.

[0003] However, the conventional sound reproducing device for reproducing the tone in a three-dimensional manner is manufactured on the assumption that it is installed in a wide place, and the device itself becomes large in scale, so that it cannot be easily moved. It will also be very expensive. Therefore, it cannot be easily used in a small space such as a small venue or a private room.

In order to reproduce a sound image closer to a natural sound in a small space such as a small hall or an individual room, a 4-channel reproduction method or a stereo sound source in which two speakers arranged before and after the listener are operated. Various attempts have been made such as a surround system which converts a pseudo sound and reproduces it.

However, such attempts have not yet been established as a system, and have reached the present, and even if a stereophonic sound source is used to form a wide acoustic space, the sound field is flat, so that the listener hears natural sound. It is impossible to reproduce the sound so that the sound image is stereoscopically sensed.

In view of the above facts, an object of the present invention is to obtain a sound reproducing device capable of compactly reproducing three-dimensionally natural sounds and environmental sounds.

[0007]

In order to achieve the above object, the present invention is provided with at least three movable pillars in which a plurality of speakers are incorporated along the length direction, and the sound generated from the speakers is A column group in which the columns are arranged at predetermined intervals so as to intersect at substantially the same portion, and a control device for operating each of the speakers based on a recorded or stored sound source are provided.

[0008]

According to the present invention, the pillar group includes at least three movable pillars, and a plurality of speakers are built in each pillar along the length direction of the pillar. These pillars are arranged at predetermined intervals so that the sounds generated from the built-in speakers intersect at substantially the same site. As a result, a sound field space in which the sound of the speaker built in each pillar can be directly heard is determined. The control device activates each speaker based on the recorded or stored sound source. As a result, the listener can feel the three-dimensional sound image in the front, rear, left, right, up, and down in the sound field space, and can hear the natural sound and the environmental sound three-dimensionally.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. The present embodiment is an example in which the stereophonic sound reproduction system of the present invention is applied to a small room such as a listening room.

As shown in FIG. 2, the listening room 52
A chair 50 is arranged in the approximate center of the chair.
A listener can sit in the. 3D sound reproduction system 10
Is provided with columns 12, 14, 16 and 18 as a movable column group, and the columns 12 to 18 are arranged at four corners of the listening room 52. Each of the columns 12 to 18 has a built-in speaker that converts an input electric signal into sound. That is, the speaker 22U is built in above the pillar 12, and the speaker 22D is built in below.
Is oriented in a direction intersecting the length direction of the column 12. It is preferable that the speakers 22U and 22D face the listener sitting in the approximate center of the listening room 52. Further, the pillar 12 is arranged so that the sounds generated by the speakers 22U and 22D are directed to the substantially center of the listening room 52.

Similarly, a speaker 24 is provided above the pillar 14.
U, a speaker 24D is built in below, a speaker 26U is built in above the pillar 16, a speaker 26D is built in below, a speaker 28U is built in above the pillar 18, and a speaker 28D is built in below. Also, the pillars 14, 16, 18
Like the pillars 12, the speakers are arranged so that the sounds generated from the speakers built in the pillars are directed to the substantially center of the listening room 52.

Each of the above speakers is composed of a tweeter for reproducing a high tone range and a woofer for reproducing a low tone range.

The upper speakers 22U-22U and the lower speakers 22D-22D built in the pillars 12-18 are
It is connected to a control unit 40 as a control device.

As shown in FIG. 1, the control unit 40 includes a digital recorder 42, a DA converter 44 and amplifiers 32, 34, 36 and 38. Although not shown, the digital recorder 42 can be loaded with a digital tape on which sound sources such as natural sounds and environmental sounds are digitally recorded. Also, eight kinds of sound sources are recorded on the digital tape so that they can be read at the same time, and the digital recorder 42 independently outputs electric (digital) signals corresponding to the eight kinds of sound sources recorded on the digital tape.

The digital recorder 42 is a DA converter 4
4, the DA converter 44 converts the input digital signal into an analog signal. This DA converter 44 is composed of eight independent DA units (8
Channels) and the input digital signals can be converted into independent analog signals of 8 channels each.

The converted 8-channel analog signals are connected to the amplifiers 32, 34, 36 and 38 every two channels. Each of the amplifiers 32 to 38 operates as an independent power amplifier for each of the two channels, and independently amplifies two weak input analog signals at a predetermined amplification rate. Therefore, the 8-channel analog signal output from the DA converter 44 is output to the amplifier 32.
Is output as an electric signal which is independently amplified by each of .about.

The amplifier 32 is connected to a speaker 22U installed above the pillar 12 and a speaker 28U installed above the pillar 18. Similarly, the amplifier 34 is
Is connected to the speaker 24U installed above the column 16 and the speaker 26U installed above the pillar 16. Also,
The amplifier 36 is a speaker 24 installed below the pillar 14.
D and a speaker 26D installed below the pillar 16, and an amplifier 38 includes a speaker 22D installed below the pillar 12 and a speaker 28 installed below the pillar 18.
Connected to D.

The operation of this embodiment will be described below. For example, a digital tape on which natural sounds are digitally recorded is loaded as a sound source in the stereophonic sound reproduction system 10. When this digital tape is played back, the digital recorder 42 is DA
Eight types of digital signals are output to the converter 44. D
The A converter 44 converts eight types of input digital signals into eight-channel analog signals. The converted analog signal is output to the amplifiers 32, 34, 36 and 38. The amplifiers 32, 34, 36, and 38 amplify the input analog signal to produce speakers 22U, 22D, 24U,
Output to 24D, 26U, 26D, 28U, 28D.
The speakers 22U to 28D generate sounds according to the input signal.

Now, the process of stereoscopically reproducing a digital tape in which natural sounds are digitally recorded will be described in detail. In the conventional stereo reproduction, speakers are arranged on the left and right in front of the listener, and a sound image can be formed in the left and right directions by reproducing a sound source of two channels. As a result, stereo reproduction that is wide in the left and right is realized.

In this embodiment, the pillars 12 to 18 having the upper and lower speakers built therein are arranged at the four corners of the listening room 52. The two speakers that are separated from each other realize wide reproduction like the conventional stereo reproduction, and thus the speakers built in the pillars 12 to 18 realize three-dimensional wide stereoscopic reproduction.

That is, the pillar 16 arranged in front of the listener.
And speakers 26D and 28D built in below the pillar 18
Reproduces sound sources of two left and right channels to form a sound image that can be localized in the left and right direction as in the case of conventional stereo reproduction. The same applies to the speakers 26U and 28U built above the columns 16 and 18. On the other hand, speakers 26D and 26U built in above and below the pillar 16
And the speakers 28D and 28U reproduce the sound sources of the upper and lower two channels to form a sound image that can be localized in the vertical direction.

When the speakers 26U and 28U installed above the pillars 16 and 18 and the speakers 26D and 28D installed below the pillars 16 are reproduced so as to form a sound image localized at substantially the center in the left-right direction, It can be felt that the sound image is localized near the center of the front pillar 16 and the pillar 18 and near the center of the upper and lower speakers. At this time,
Speakers 26D and 26U built in above and below the pillar 16 and two speakers 28D and 28U built in above and below the pillar 18 are regarded as one speaker, and lateral localization is possible as described above. When the two speakers are simultaneously controlled so as to form a sound image, the sound image localized near the center in front of the listener moves left and right. Similarly, a speaker 26 built in above the pillars 16 and 18
U, 28U and speakers 26D, 28 built in below
Considering each two speakers of D as one speaker,
As described above, when the sound images are localized so that they can be localized in the vertical direction, the sound images localized near the center in front of the listener move up and down.

Therefore, the speaker 26 built in the pillar 16 and the pillar 18 according to the position of the sound image localized in front of the listener.
By playing D, 26U, 28D, 28U,
A sound image can be freely localized over substantially the entire area in the vertical and horizontal directions in front of the listener.

Similarly, the speakers 22D, 22U, 24 built in the pillars 12 and 14 arranged behind the listener are also provided.
With D and 24U, the sound image can be freely localized over substantially the entire area in the up, down, left, and right directions behind the listener.

Speakers 22D, 22U, 28D built in the pillar 12 and the pillar 18 arranged on the right side of the listener,
Similarly, in 28U as well, the sound image can be freely localized over substantially the entire area in the up, down, front, and rear directions on the right side of the listener, and the speakers 24D and 24U built in the pillar 14 and the pillar 16 arranged on the left side of the listener. , 26D, and 26U, the sound image can be freely localized over substantially the entire area of the left, right, up, and down of the listener.

Further, in the speakers 22U, 24U, 26U and 28U built in above the pillars 12 to 18, similarly, the sound image can be freely localized over substantially the entire area in the front, rear, left and right directions above the listener, The speakers 22D, 24D, 26D, and 28D built in below the columns 12 to 18 can freely localize the sound image over substantially the entire front, rear, left, and right directions below the listener.

As described above, the upper speakers 22U to 2U built in the pillars 12 to 18 arranged at four places around the listener.
8U and the lower speakers 22D to 28D can reproduce the sound image in the listening room 52 so that the listener can stereoscopically feel the sound image in the front, rear, left, right, and up and down directions.

As described above, since the speakers are built in above and below the pillar and the pillars are arranged at the corners of the listening room 52, there is no need to arrange a special device for reproducing stereophonic sound. It is possible to easily realize the reproduction of stereophonic sound. In addition, in general, since the pillars can be set around the listener without a sense of discomfort, stereophonic sound can be easily reproduced without providing a special exterior or interior decoration such as a partition. In addition, the movement of each pillar is easy, and by arranging each pillar at a specific position where reproduction of stereophonic sound is desired, a sound field for stereophonic sound reproduction can be easily formed.

In the above embodiment, an example in which a stereophonic sound reproducing system is realized by using four columns has been described, but the present invention is not limited to four columns.
Three columns or more than four columns may be used.

Further, in the above-mentioned embodiment, the case where two speakers, one on the top and one on the bottom, are used in total has been described, but the present invention is not limited to this.
You may make it incorporate three or more speakers.

Further, in the above embodiment, the case where the digitally recorded tape is reproduced by dividing the sound source such as natural sound into 8 kinds (8 channels) has been described, but the present invention is not limited to this. , May exceed 8 types, 3
If you want to operate the speaker built in two pillars,
Kind may be used.

Further, in the above embodiment, an example in which two amplifiers are independent power amplifiers 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 the sound reproducing device which can easily reproduce the natural sound and the environmental sound in a small space such as a small hall or an individual room. There is an effect.

Further, since the acoustic space is formed by disposing the pillars in which the speakers are built in, the stereophonic sound can be easily produced without providing a special decoration such as a partition as a listening space. There is an effect that reproduction can be realized.

Further, since each pillar can be easily moved, the three-dimensional sound can be obtained by arranging each pillar at a specific position where the reproduction of the three-dimensional sound is desired to be realized without being restricted by the listening place and space of the listener. There is an effect that a sound field for reproduction can be easily formed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram illustrating a sound reproducing device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of an embodiment of the present invention.

[Explanation of symbols]

 10 stereophonic sound reproduction system 12, 14, 16, 18 columns (column group) 22, 24, 26, 28 speaker (speaker) 32, 34, 36, 38 amplifier 40 control unit (control device) 42 digital recorder 44 DA converter

Claims (1)

[Claims] 1. A plurality of speakers are provided with at least three movable pillars that are built in along the length direction, and the pillars are arranged at predetermined intervals so that sounds generated from the speakers intersect at substantially the same site. A sound reproducing device comprising: a group of pillars arranged; and a control device which operates each of the speakers based on a recorded or stored sound source.