JP2599931Y2 - Small microphone - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small microphone having both a microphone for expanding normal voice and a microphone having a function of recording and reproducing the voice simultaneously with the voice.

[0002]

2. Description of the Related Art In emergency vehicles such as fire trucks, ambulances, police cars, etc., which are dispatched on an urgent duty, and in places where many people gather in station trenches, etc., voices for warning, guidance, guidance, street announcement, etc. It may be necessary to broadcast repeatedly in a short time.
Such street broadcasts generally consist of words with short phrases, and often have the same phrase repeated in order to be understood by many people.

[0003] In such a case, the sound generated first is broadcasted by a normal microphone, but the repeated broadcast portion is recorded with the initial sound, and if the recorded sound is reproduced, the same phrase can be created. This eliminates the need to repeatedly generate the voice.

[0004] As a microphone having a function corresponding to such a demand, there has been conventionally known a combination of a microphone for normal audio broadcasting, a cassette for simultaneously recording and reproducing the audio and a recording and reproducing device for the microphone. Have been.

[0005]

[Problems to be Solved by the Invention] However, apart from a normal microphone for audio broadcasting, a cassette tape for recording and reproducing audio and repeatedly broadcasting the audio and a recording / reproducing device thereof are recorded on the cassette tape. It takes a long time to perform the cueing operation of the voice that is sounding, and in the case of an emergency, there may be a case where it cannot be justified.

When a cassette tape is used, there is a mechanically worn portion such as a pinch roller for running the tape, so that the cassette tape has a certain life, and if the use period is prolonged, replacement of parts is required. Also, the sound may be deteriorated due to the deterioration of the tape and the head.

[0007] This invention takes into account the various problems involved in the above-mentioned conventional microphone using a cassette tape, and uses a voice analysis / synthesis logic circuit instead of a voice recording method using a cassette tape to record a voice. It is an object of the present invention to provide a small microphone capable of instantly locating an audio phrase to be broadcast by a simple operation in accordance with the above-mentioned operation and repeating the broadcast.

[0008]

As a means for solving the above problems, the present invention comprises a first microphone for normal audio broadcasting and a second microphone for recording and reproduction, and the audio signal detected by the second microphone is A common changeover switch is provided for an output line that is sent to a logic control circuit and reproduces and outputs an audio signal through an audio analysis / synthesis logic circuit in the control circuit and an output line of the first microphone. The stored audio signal data was read out, and the small microphone was constructed so as to be freely broadcast one or more times.

In this compact microphone, it is preferable that the storage memory is a writable and readable random access memory. Alternatively, the storage memory may have both a fixed memory and a random access memory.

[0010]

By operating the switch, the small microphone of the present invention having the above-described structure can be switched between a microphone for normal audio broadcasting and a microphone capable of repeatedly broadcasting its sound. .

The voice signal of the second microphone is analyzed by a voice analysis / synthesis logic circuit, and a voice characteristic signal is stored.

At the time of reproduction, the characteristic signal is read out, the original audio signal is synthesized and output. Therefore, by repeating the synthesizing operation, the audio signal can be repeatedly broadcasted many times.

The above-mentioned recording and reproducing operations are performed through a logical control circuit, and the audio signal is stored or read at a designated address portion of a storage memory. It is quick and instantaneous with simple operations.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall schematic black diagram of the small microphone of the embodiment. A first microphone 1 and a second microphone 2 are provided. The microphone 1 is for normal audio broadcasting, and a detected audio signal is output from the output terminal 3 as it is.

The microphone 2 is provided for recording and reproduction, and the detected audio signal is sent to a logic control circuit (microcomputer) 4. Although not shown, the audio signal is converted into a binary signal by a binarizing circuit on the way and sent at a predetermined timing. Although not shown, the logic control circuit 4 includes a speech analysis / synthesis circuit.

As the voice analysis / synthesis circuit, an IC circuit for compressing and storing voice characteristic parameters by a generally used PARCOR method is used, but another type may be used. Data such as voice feature parameters analyzed by the voice analysis / synthesis circuit is stored in the storage memory 5. At the time of reproduction, the stored data is read out, and a voice is synthesized by the effect of the reflection described above.

The storage memory 5 is a RAM in this embodiment.
(Random access memory) is used to store the audio signal from the microphone 2 only when necessary. Reference numeral 6 denotes a battery power supply, and reference numeral 7 denotes a power switch circuit.

The storage memory 5 may use both a ROM (Read Only Memory) and a RAM. In this case, a switch for switching which storage information is used is provided. In the case of a ROM, an audio signal analyzed by another audio analysis circuit is stored in advance, and in that case, the data is simply read and the audio signal is synthesized.

Reference numeral 8 denotes an operation switch of the logic control circuit 4, which includes three types of switches 8a, 8b and 8c as shown in the figure. 8a is a switch for storage operation (REC), 8b is a switch for stop operation (STOP), and 8c is a switch for reproduction operation (PLAY). Reference numeral 9 denotes a microswitch, which is a common switch for the output line of the microphone 1 and the output line of the logic control circuit 4.

FIGS. 2 to 4 show schematic diagrams of a small microphone in which the circuit components shown in the above block diagram are housed in one small case. 2 is a plan view showing the case with the upper surface thereof removed, FIG. 3 is a cross-sectional view taken along line III-III, and FIG. 4 is a cross-sectional view taken along line IV-IV.

As shown, the electronic components other than the microphone 2, the battery power source 6, and the microswitch are all set on the circuit board 10.

The miniature microphone of the embodiment having the above-described configuration is used as follows. First, while the micro switch 9 is pressed, the mode is set to the normal audio broadcast only mode by the first microphone 1, and no audio is recorded during that time. In other words, it is just a normal hand microphone.

Next, when the micro switch 9 is not pressed, the audio signal from the first microphone 1 can be output from the output terminal 3 and the audio signal from the second microphone 2 is sent to the logic control circuit 4. Can be When the REC switch 8a and the PLAY switch 8c are simultaneously pressed, the audio signal is stored in the RAM. When the voice of the phrase of the required length is stored, the recording is stopped by pressing the STOP switch 8b.

When the recorded sound is reproduced and broadcast, if only the PLAY switch 8c is pressed again, the stored sound is read out from the RAM and output.
At this time, when the PLAY switch 12 is in the ONCE position, the audio broadcast is repeated only once,
At the EPEAT position, audio broadcasting is repeatedly performed many times.

In the above description, the storage memory 5 is a RAM
Only the case where only the R
If both the AM and the ROM are used, the RAM shown in FIG.
A / ROM switch 11 is provided. When recording the above-mentioned sound, the RAM / ROM switch 11 is set to the RAM.
It is performed in the state switched to the side. When the switch is switched to the ROM side, recording cannot be performed, so that sound broadcasted in advance in the ROM is synthesized and sound broadcast is performed.

Further, although not shown in FIG. 1, FIG.
Are turned on when the REC switch 8a and the PLAY switch 8c are pressed.

[0027]

As described in detail above, the small microphone of the present invention has two microphones for normal audio broadcasting and recording and reproduction, and the audio signal of the recording and reproduction microphone is analyzed by the audio analysis and synthesis logic circuit. Recording in the storage memory, and then synthesizing it again and playing it back so that the normal voice broadcast and the voice that recorded it can be broadcast repeatedly. When it is necessary to warn or notify a person, the inconvenience that the operation takes time and effort and cannot be performed quickly like a device that reverses the tape recording or repeats the operation endlessly with a conventional cassette tape. The advantage is that a very convenient and compact microphone that has been eliminated and has a long service life and requires no maintenance is obtained.

[Brief description of the drawings]

FIG. 1 is an overall schematic block diagram of a small microphone according to an embodiment.

FIG. 2 is a plan view of the above.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st microphone 2 2nd microphone 3 Output terminal 4 Logic control circuit 5 Storage memory 8 Operation switch 9 Micro switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04R 27/00 G10L 9/18 H04R 3/00 320

Claims (3)

(57) [Scope of request for utility model registration] An audio signal comprising a first microphone for normal audio broadcasting and a second microphone for recording and reproduction is sent to a logic control circuit, and the audio analysis and synthesis in the control circuit is performed. A common changeover switch is provided for an output line for reproducing and outputting an audio signal through a logic circuit and an output line of the first microphone, so that the normal audio broadcast and the stored audio signal data are read out, and the broadcast is repeated one or more times. A small microphone that can be configured freely. 2. The small microphone according to claim 1, wherein the storage memory is a writable and readable random access memory. 3. The small microphone according to claim 1, further comprising a fixed memory and a random access memory as the storage memory.