JPS6295096A - Acoustic reproducing system - Google Patents

Abstract

PURPOSE:To reproduce a natural and environmental acoustic space having a stereophonic atmosphere as if sound images of songs of various wild birds move in various ways by controlling the correspondence of acoustic signals distributed in plural speakers and the speakers according to a predetermined program. CONSTITUTION:A basic system of system is constituted by an input part 1, an acoustic signal reproducing part 2, a selecting part 3, an automatic pan pot part 4, a speaker control part 5, an output amplifier part 6 and speaker groups 7. There are provided there optical sensors disposed at three positions as a start input device of the input part 1, songs of 18 types of birds as an acoustic signal reproducing unit f the acoustic signal reproducing part 2 and 6 speakers dispersed and disposed at 6 positions as the speaker groups 7. By controlling the correspondence of the acoustic signals distributed in the plural speakers and the speakers according to the predetermined program, the acoustic and environmental space in which the various birds are flying and chirping is realized.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention provides an acoustic space similar to the natural environment to visitors and participants in relatively large places such as tourist spots, parks, expositions, and exhibitions. The present invention relates to a sound reproduction system suitable for providing.

(Prior Art) As shown in Fig. 6, the sound reproduction system of the simplest configuration conventionally used for explanations at this type of exhibition hall, etc. uses push buttons or human power sensors to respond to attendees' requests or presence. The activation human power 11 detects the sound and starts the audio playback device (such as a tape recorder or digital voice IC).
A system is used in which a sound reproducer (12) is activated and attendees can hear the sound from a speaker (14) as appropriate.

In addition, when the purpose is to reproduce three-dimensional sound, a stereo audio tape prepared in advance using a stereo audio tape recorder 15 or a multi-channel audio tape recorder There is a device that reproduces audio according to a startup input, and reproduces sound from speakers 14 arranged for stereo.

(Problems to be Solved by the Invention) As described above, in conventional sound reproduction systems, pre-produced fixed sounds (sounds) are reproduced in a single format, so various sound effects, such as In order to create a natural environment-like space in which various birds fly around while chirping, a program with a large number of stereo sound effects is produced by arranging a large number of stereo audio (sound) reproducers 15 and speakers. It was necessary to set up multiple channels and switch between them, or to prepare a large number of multi-channel sound reproducers 16 loaded with programs in advance. It was also not easy to produce programs with various sound effects.

(Means for Solving the Problems) The purpose of the present invention is to solve the above-mentioned problems, and to create a natural environment that has a three-dimensional effect, such as the sound images of various wild bird calls moving in various ways. The present invention aims to provide a system for reproducing a unique acoustic space at a low cost by using a skillful combination of relatively simple devices and circuits.

That is, the sound reproduction system of the present invention includes: an audio signal reproduction section capable of reproducing a plurality of acoustic signals; an input section including at least one activation input device; an autopan pot, comprising: a signal selection unit capable of selecting a desired sound signal from among; and at least one audio signal selector that causes the selected sound signal to sequentially fade in and fade out to a distribution destination; a plurality of speaker groups arranged three-dimensionally, and a speaker control section that controls the correspondence between the acoustic signals distributed to the plurality of speakers and the speakers according to a predetermined program, and This system is characterized by being able to artificially reproduce a typical acoustic space.

(Examples) Examples of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the basic system of the sound reproduction system according to the present invention. In FIG. 1, the input section l is n
Start input device 1-1. i2. ---.

These are switches for pushbuttons, optical sensors, etc., which are usually distributed in l-n. The acoustic signal reproduction unit 2 includes β acoustic signal reproduction units 2L2-2, ----., which selectively reproduce acoustic signals (including audio signals). 2-1! Consists of. The selection unit 3 is a matrix-like circuit that selects a desired audio signal from the audio signal reproduction unit 2 in response to an activation signal, or switches the desired audio signal according to a pre-programmed format, and specifies the selection and format. It also has a manual switch. The audio reproduction signal from the selectively activated audio signal reproduction unit is guided to the auto panbore I part 4 which operates so as to be sequentially output to a plurality of outputs, and this autopan bore h part 4 is normally connected to the auto panbore h part 4 of the activated human powered machine. n autopanbot unisoto 4-1 corresponding to the number,
Consists of 4-2, ---, 4-n. The auto-panpotted signal output lines are connected to m pieces distributed three-dimensionally via the speaker control section 5 that performs switching control and the subsequent output amplification section 6 according to a predetermined relationship or a programmed pattern. Speaker 7-1゜7
-2. -1-, 7-m. The speaker control section 5 usually has a matrix circuit configuration or a switching circuit controlled by a microprocessor.

As described above, the basic system of the system according to the present invention includes an input section 1, an audio signal reproduction section 2, a selection section 3, an auto panpot section 4, and a speaker system. It is composed of an Il1 section 5, an output amplification section 6, and a speaker group 7.

FIG. 2 shows a more specific example of the configuration of the system of the present invention.

In this example, three optical sensors divided into three locations are used as the activation input device of the input section 1, 18 types of bird calls are used as the pass/fail signal reproducing unit of the acoustic signal reproducing section 2, and six locations are used as the speaker group 7. It has six speakers arranged in a dispersed manner, and aims to create an acoustic environment in which various birds can be heard flying around while chirping.

The acoustic signal reproducing unit 2 includes an acoustic signal reproducing unit 2-1, 2-2, -- of the digital voice reproducing IC unit.
--, 2-18, and the selection section 3
3 out of 18 types of bird calls can be selected using the manual switch located on the
Select the type arbitrarily. For example, start input device 1-
In the sensor A system of No. 1, the acoustic signal is regenerated 22, the bird's cry #2 of No. 2 (for example, parentheses), and the activation input device 1-.
2 and 1-3 sensors B system and C system, respectively, audio signal reproduction UNISO) 2-13.
Precent it like this.

First, the optical sensor A operates, and the digital voice reproducing IC unit node of the audio signal reproducing unit node 2-2 is activated according to the preset of the selection section 3.
cry #2 starts.

In this case, this cry #2 continues for about 10 seconds. The reproduced sound reproduction signal a is sent to the autopanbot unit 4-1 of the autopanbot/gutter section 4.

The auto pan pot unit is an electronic circuit module with a dynamic volume control function that automatically operates in sequence.
It has a plurality of output lines for one input line, and operates by switching to sequentially fade in, fade out, or cross fade. For example, the second
In the case of 3 outputs as shown in the figure, the level of the output signal, that is, the sound ff1 during the given approximately 10 seconds as shown in Figure 3.
3Ii savings will change.

The activation signal of the input section 1 is the auto panbo/nod unit 4-
1, and the autopanbot unit 4-1 also operates at the same time as the start of the reproduced acoustic reproduction signal a,
The continuous operation is automatically performed for about 10 seconds while outputting the output signals a-1a-2 and a-3. After 10 seconds have elapsed, it returns to its initial state and waits for a start signal again. The operations described above are exactly the same for the sensor B system and C system.

Next, the output signal a-1 of the auto pan pot unit 4-1
, a-2, and a-3 are led to the speaker control section 5, where connection relationships with the individual speakers distributed in a distributed manner are specified. This connection relationship can be specified arbitrarily, or it can be fixedly preset in advance.
Furthermore, the connection relationship may be changed dynamically, for example, each time the auto pan pot is operated. In the example in Figure 2, the sensor A system is speaker 7-1.7-3.7.
-5 (Speaker Field, (3), Sono), and in exactly the same way, the output signals b-1, b-2, b-3 of the sensor B system are the speakers 7-2, 7-
4.7-6 (Speakers from 9 countries.

The state shown is that it is preset to the circle.

Here, the sensor C system has been devised to produce even more diverse sound image movement effects, and in the example in Fig. 2, the auto panbot unit 4-3 at this time is It operates twice (about 20 seconds), and the first time is to output signals c-1, c-2, c-
3 is connected to the speaker ■, (2) one port, and the second is the speaker country.

The prisoner has been connected twice. Therefore, when the optical sensor-C of the activation input device 1-3 is activated (in the example of Fig. 2, the sound of the crow #5), the sound image moves across the speakers D, a, and (3) in the first 10 seconds. Go, next 1
Speaker [8, [B, D.

and the sound image moves.

The above-described specific configuration example produces an extremely large effect when applied to a bridge installed on a promenade in a park or the like. In other words, the optical sensors A, B, and C are placed at both ends of the bridge (A) and (B
) and the center (C). Now, when a person crosses the bridge ((A)), sensor 8 detects it and plays one of the three preset bird calls (brackets - #2 in Figure 2). , speaker country, 0
．． As the circles move sequentially, a three-dimensional pass/fail effect of birds flying away while chirping can be automatically created for about 10 seconds from speakers that have been installed with careful consideration of distance, distance, and height (see Figure 4). a)). Next, the central part of the bridge ((C))
When a person walks by and sensor C is activated, the second bird (
In Fig. 2, the main port #5) is connected to the speakers ■, (2), (3), [IN, [B'11. ■
and so on, and a sound image movement different from the previous one appears (
(See Figure 4(c)). By the time the last person crosses the bridge (
(B)) According to sensor B, a third bird (Shrike #13 in Fig. 2) makes a different sound image movement with a different call (see Fig. 4 (b)).

Figure 4 (a), (b), and (c) are sensors A and B, respectively.

C shows the sound image movement during operation with arrows,
Here, each speaker o, [B], o, (4), ■.

■ occupies relatively high, slightly far, slightly low, relatively high, close and low, and far and high positions, respectively.

Next, other embodiments will be described. In the above embodiment,
The pass/fail signal reproducing section 2 had a configuration in which one type of bird's song was stored in one unit, but in order to simplify the device, a unit that recorded a large number of temporally short acoustic reproduction signals was added. In this case, the unit can be configured so that only one reproduction signal output system is provided. In this case, the scale of the apparatus can be further simplified by changing the arrangement of the selection section 3 and the pass/fail signal reproducing unit section 2 as shown in FIG. With this configuration, the speaker control section 5 on the output side
In addition to specifying the connection relationships in
It can be played from.

Specified control Q in the selection section 3 and speaker control section 5
[l] may, of course, be controlled by a manual preset switch, a fixed wiring connection, or a microprocessor capable of specifying the dynamics and linearity. For example, the designation in the selection unit 3 may randomly change to a different (or the same) type of acoustic signal for each operation, or the designation in the speaker control unit 5 may be changed to a different (or the same) type of acoustic signal for each operation. (same) connection relationship may be changed. In this way,
The movement of the sound image of the crow's cry as explained in the specific configuration example above can be changed more delicately, and this operation can be easily performed by a control program using a microprocessor. In addition, when controlling with a microprocessor, by setting various operation modes in advance as a control program, during actual operation, it is possible to perform even more control with simple operation input to specify the operation mode. A variety of operations can be performed.

Furthermore, it may be combined with a clock device to automatically control operating hours, seasonal operating modes, and the like.

In addition, by combining methods such as answer-hacking and displaying an operating signal on a display board or a part of an input sensor to indicate which type of bird is currently singing, it can be a desirable system from an educational standpoint. can be easily done.

(Effects of the Invention) As described in detail above, according to the present invention, there is a great effect that a variety of three-dimensional sound ancient environmental spaces can be produced using a relatively small-scale acoustic signal reproducing device.

In particular, when applied in parks etc., the types of wild birds can be changed each time according to the season, and the movement of the sound image makes it sound like wild birds are flying around in a natural forest.
Even in places where there are few wild birds, it is possible to create a three-dimensional acoustic space similar to the natural environment while preserving the natural landscape, thereby providing a system that is extremely useful for education, tourism, and improving the welfare of local residents.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the basic system of the sound reproduction system according to the present invention, Figure 2 is a circuit diagram showing one embodiment of the system of the present invention, and Figure 3 is the output signal of the autobamboo sotounisoto. FIG. 4 is a diagram showing changes in level, and shows an example of the arrangement of the starting power device and the speaker when the embodiment of FIG. 2 is applied, as shown in FIG. 4(a). (b), fc) are diagrams showing sound image movement (arrows) when sensors A, B, and C operate, respectively. Figure 5 is a circuit diagram showing another embodiment of the present invention. Figure 6 is a conventional circuit diagram. 7A and 7B are diagrams showing a conventional three-dimensional sound reproduction system. 1... Input unit 1 1, 1-2. ---, I-n-n activation input devices 2...sound reproduction units 2-1.2-2.----.2-7!...one audio signal reproduction unit 3...・Selection unit 4... Auto panbot unit 4-1. 4-2.---.4-n...n auto panbot Unisoto 5... Speaker control unit 6... Output control Part 7...
・Speaker group 7-1. 7-2. ---. 7-m...m (hard speaker 8... control program input device 9... microprocessor - 11... human power for starting 12... voice (sound damage)
Regenerator 13... Output amplifier 14... Speaker 15... Stereo audio regenerator 16... Multichannel audio regenerator 17... Produced program

Claims (1)

[Claims] 1. An audio signal reproducing unit capable of reproducing a plurality of audio signals; an input unit including at least one activation input device; a signal selection unit capable of selecting a desired audio signal from among; an autopanpot unit including at least one autopanpot unit that operates to sequentially fade in and fade out the selected audio signal to a distribution destination; It is equipped with a plurality of three-dimensionally arranged speaker groups and a speaker control section that controls the correspondence between the acoustic signals distributed to the plurality of speakers and the speakers according to a predetermined program, and produces natural environmental sound. A sound reproduction system characterized by being able to reproduce space artificially.