JPH01265734A - Automatic acoustic broadcast system - Google Patents

Abstract

PURPOSE:To execute an optical music acoustic notice automatically with simple constitution by using a storage reproducer for electronic music information as a sound source device so as to apply acoustic broadcast by a speaker. CONSTITUTION:An automatic acoustic notice system 10 is provided with a program unit 12, a clock device 13, a sound device 15, plural amplifiers 17 and plural speakers S. Then the program unit 12 stores broadcast command information including a broadcast music and a broadcast time, receives a time signal St from the clock device 13, sends a start signal Sa, the sound source device 15 stores the music information for each music, converts the music information of a designated music in time series into an audio signal Sau by using the start signal Sa, the amplifier 17 receives the audio signal Sau from the sound source device 15 and gives an output to the speaker S. Thus, an optional music acoustic broadcast is broadcast automatically with compact constitution at a regular time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an automatic audio broadcasting system that can automatically broadcast music of a predetermined song at a predetermined time in public facilities such as schools and plazas. .

In public facilities such as conventional technical schools, in order to notify the time,
Acoustic notification means such as bells, chimes, bells, and sirens are widely used. Since these acoustic notification means are generally manually controlled, it is necessary for a person in charge, such as a janitor, to operate them at the arrival of the notification time to make a notification at a predetermined time. However, since such a system requires extremely complicated manual operations by the person in charge at each notification time, it is widely practiced to automate this by combining it with an appropriate timer device or the like.

The problem to be solved by the present invention is that when such conventional technology is used, it is often possible to generate only a sound of a single pitch, such as a bell, so the sound to be announced is simple and does not create any special musical emotion. The problem was that it was not possible to create a Also, chimes,
It is possible to make full-fledged musical sound notifications by using a larger-scale carryon or a device that can generate multiple pitch sounds known as a so-called music siren, but these devices are The reality is that they are generally complicated and expensive, and their widespread use is not necessarily high.

SUMMARY OF THE INVENTION In view of the actual state of the prior art, an object of the present invention is to use an electronic music information storage/reproduction device as a sound source device and perform sound broadcasting using a speaker, thereby making it possible to produce arbitrary music with a simple configuration. An object of the present invention is to provide a new automatic acoustic broadcasting system that can automatically carry out acoustic announcements.

Means for Solving the Problems The configuration of the present invention to achieve the object includes a clock device, a program unit, a sound source device, a plurality of amplifiers, and a speaker, and the program unit is configured to listen to broadcast songs and broadcast times. The sound source device stores the broadcast command information including the following, inputs the time signal from the clock device and transmits the start signal, and the sound source device stores the music information for each song and starts the music of the specified song by the start signal. The gist is that the information is converted into an audio signal in time series, and the amplifier inputs the audio signal from the sound source device and outputs it to the speaker.

The clock device may be equipped with a radio wave calibration function, the amplifier may be equipped with a function to correct distortion of the sound field due to wind, and the speaker may be built in a bell-shaped enclosure. shall be taken as a thing.

With this configuration, when the time for broadcasting arrives, the clock device transmits a time signal to the program unit, and the program unit stores information in response to this. A predetermined broadcast program is selected from among the available broadcast command information, and a start signal is transmitted.

The sound source device that receives the start signal selects the music information that corresponds to the specified song from among the stored music information.
This is converted into an audio signal in time series and input to an amplifier. Therefore, the amplifier can broadcast sound of the designated song through the speaker.

Note that if the clock device is equipped with a radio wave calibration function, the acoustic broadcast can always be performed at an accurate predetermined time. Furthermore, if the amplifier is equipped with a function to correct distortion of the sound field caused by the wind, it is possible to form an appropriate sound field that covers a predetermined broadcasting area, taking into account the current wind direction and wind speed. It is possible to effectively eliminate the possibility of broadcasting an excessively high level of sound outside the broadcasting area, or of insufficient sound level within the broadcasting area. Furthermore, if the speaker is built into a bell-shaped enclosure, it is possible to create an atmosphere that visually resembles a chime or karyon.

It works as described above.

The automatic acoustic notification system 10 according to the embodiment includes a program unit 12
, a clock device 13, a sound source device 15, and a plurality of amplifiers]-7, 17, etc. as main components (the first
figure).

A manual setting signal Sml from the operating unit 1-1- and a time signal St from the clock device 13 are input to the program unit 12. The program unit 12 stores broadcast command information including broadcast program titles and broadcast times, and the contents of this broadcast command information can be arbitrarily rewritten and updated using a manual setting signal Sml. Further, the broadcast command information may include additional command information such as designation of the day of the week when broadcasting should be suspended and designation of the number of repetitions of each song.

The clock device 13 includes a clock 13a, an FM receiver 13b,
Multiple child clocks]-3C113c..., FM
The receiver 13b sends a time advance signal S to the clock 13a.
While outputting tc, child time H'1I3c, ], 3 c
... are connected to the clock 13a. The FM receiver-3b realizes a radio wave calibration function for the clock device]-3 by receiving public radio broadcast waves and creating a time advance signal Stc from the time signal information.

A start signal Sa output from the program unit 12 is input to the sound source device 15 via the control section 14. The control unit 14 not only relays the start signal Sa but also inputs the manual operation signal Sm2 from the operation unit 1.1, through which it is possible to perform, for example, a manual operation for a trial run. shall be.

The sound source device 15 consists of a combination of a music memory 15a and an effector unit h15b. A read-only memory (ROM) that stores information electrically. The latter is a kind of signal conversion unit that produces an audio signal Sau that effectively adds a bell tone, for example, to the music information read out in time series from the music memory 1-5a.

The audio signal Sau from the sound source device 15 is sent to the distributor 1
6, the signal is branched into a plurality of amplifiers 17, 17, . . . , and the output of each amplifier 17 is connected to a speaker S. Each amplifier 17 also includes a gain controller 1.
A gain control signal Sg from 8 is input, and a wind vane and an anemometer F are connected to the gain controller 18.

Now, the clock device 13 determines the broadcast time ti (i = 1.2
... n) is output to the program unit 12 via the time signal St, the program unit 1-2 selects the broadcast command corresponding to the broadcast time ti from among the stored broadcast command information. The program item Mi and the number of repetitions ni of the program item Mi are found (FIG. 2). Here, it is assumed that the contents of the broadcast command information are appropriately set and stored in advance by operating the operation unit 11 via the manual setting signal Sml.

Song number Mi found by program unit 12
and the number of repetitions ni form the contents of the start signal Sa, which is input to the sound source device 15 via the control section], 4. That is, the program unit 12 receives the time signal S
A start signal Sa can be transmitted in response to t. Therefore, the music memory 15a of the sound source device 15 reads the music information corresponding to the designated song Mi in chronological order and sends it to the effector units h], 5b.
The effector unit l-15b outputs an audio signal Sau corresponding to the music program Mi in time series.

At this time, if the effector unit 15b adds a bell tone to this music information, the audio signal Sau
As such, it is possible to obtain a signal equivalent to a musical performance by a bell (chime or karyon). Therefore, amplifier 1
7.17... is transmitted through speakers S, ,S...
Since this audio signal Sau can be acoustically broadcast, the music of the program Mi with the tone of a bell will be acoustically broadcast from the speakers S1S...

The number of repetitions ni included in the broadcast command information is ni≧2
When this is the case, the music memory 15a can repeatedly output the music information of the program Mi for ni times, so that the music information of the program Mi broadcast from the speakers S, S, etc.
can also be repeatedly broadcast ni times.

The operation of the gain controller 18 is as follows.

Now, four speakers S, S... are used in a concentrated arrangement, and these speakers S, S... create a sound field that covers a predetermined broadcasting area at an appropriate sound level. D1 shall be formed (FIG. 3(A)).

When there is a wind W, this sound field D1 is distorted so as to be swept to the leeward side, and becomes a sound field D2 ((B) in the same figure).
The degree of distortion depends on the wind speed of the wind W. Therefore, by detecting the current wind speed and direction using the anemometer F and the wind vane, it is possible to determine the direction and degree of distortion in the sound field D2. Each amplifier 17
In order to determine the gain of the gain control signal Sg, Sg...
・It is something that generates. That is, the gain of the amplifier connected to the speaker S toward the windward side is increased, the gain of the amplifier connected to the speaker S toward the leeward side is narrowed down, and the range of gain change is adjusted depending on the wind speed. All you have to do is set it.

As for the shape of the speaker S1S..., if a cone speaker built into a general trumpet speaker E is used, it will be possible to create an even better atmosphere for the sound broadcast of the bell sound (see Figure 4). ). Here, enclosure E
consists of an upper portion E1 of the chamber containing the speaker S, and an acoustic duct E2a. , E2a and a lower portion E2 having openings E2b, E2b are connected, and the acoustic duct E2a,
E2a and opening E2b. , E2b can guide the sound from the speaker S toward the peripheral wall of the enclosure E, so that the sound diffusion characteristics around the enclosure E can be made extremely good.

When a read-only memory is used as the music memory 15a of the sound source device 15, it is preferable to make it removable in preparation for changes in the song list Mi depending on the season or the like. Also, effect unit]-5b is a music memo! Not only does it decode the music information from J15a and create an audio signal Sau of the tone of a specific instrument, for example, a bell, but it also adds a reverb unit that adds a reverberation effect to make the audio broadcast even more interesting. It is something that can be done.

Furthermore, the sound source device 15 may be replaced with any other audio playback device, such as a compact disc device or tape recorder device, as long as it can quickly locate the beginning of the specified track Mi. do.

As described in detail, according to the present invention, by including a clock device, a program unit, a sound source device, and a plurality of amplifiers, the sound source device is electronically controlled by a time signal from the clock device. Since it is possible to play stored music and broadcast it from a speaker, it is much more compact than when using a chime or chime, making it cheaper and lighter. In addition, it has the excellent effect that any musical sound broadcast can be automatically broadcast at a fixed time.

In addition, if the clock device is equipped with a radio wave calibration function, the accuracy of scheduled broadcasts can be increased, and it can also be effectively used as a clock system with a child clock. With this function, the sound level within the broadcast area can be maintained at an appropriate level at all times.

Furthermore, if the speaker is housed in a bell-shaped enclosure, a good atmosphere can be created visually, and the effect of sound diffusion to the surroundings can be further enhanced.

[Brief explanation of the drawing]

Figures 1 to 4 show examples, Figure 1 is an overall system diagram, Figure 2 is a configuration diagram of broadcast command information, and Figure 3 (A).
, (B) is an explanatory diagram of the sound field distortion correction function, and FIG. 4 is an explanatory half-sectional diagram of the enclosure. St... Time signal Sa... Start signal Sau... Audio signal W... Wind D], D2... Sound field S... Speaker E... Enclosure 1-0.
...Automatic sound broadcasting system 12...Program unit]-3...Clock device 15...Sound source device 1-7...Amplifier

Claims (1)

[Scope of Claims] 1) A clock device, a program unit that stores broadcast command information including a broadcast program and a broadcast time, inputs a time signal from the clock device, and transmits a start signal, a sound source device that stores music information and converts the music information of a designated song into an audio signal in time series according to a start signal from the program unit; and inputs the audio signal from the sound source device and outputs it to a speaker. An automatic sound broadcasting system comprising a plurality of amplifiers. 2) The automatic sound broadcasting system according to claim 1, wherein the clock device has a radio wave calibration function. 3) The automatic sound broadcasting system according to claim 1 or 2, wherein the amplifier has a function of correcting distortion of the sound field due to wind. 4) The automatic sound broadcasting system according to any one of claims 1 to 3, wherein the speaker is built in a bell-shaped enclosure.