JPS59500744A - Automatic communication system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field of the invention of “Paotora Ring Air Communication System” TECHNICAL FIELD The present invention relates to communication systems, and in particular to systems for the transmission of speech.

Background technology Sound transmission systems utilize microphones, or transducers, that The sound waves generate or modulate electrical signals. The microphone is The input of the circuit that transmits the signal to the receiver by wire or wireless means. connected to the power side. A telephone uses a microphone to detect the voice of the person speaking. , the microphone signal is amplified and then sent to a receiver with the listener's earphones. This is an example of a voice transmission device that transmits audio to Commonly used wireless transceivers The speaker modulates the frequency or amplitude of the radio signal in such a way that the voice of a person speaking modulates the frequency or amplitude of the radio signal. The radio signal is detected by the applied microphone and the radio signal is detected by the receiver. It is an audio transmission system that is detected.

Conditions that make it inconvenient to use microphones in existing audio transmission systems There are several situations. In a noisy environment, electrical signals may be affected by ambient sounds that are similar to voice. modulated, causing poor communication between speaker and listener.

If you are wearing a gas mask or other mask, do not place the microphone inside the mask. If you do not use the microphone, you will substantially increase the cost of the microphone, and the microphone will not be used orally. The need to distance often makes masks more bulky than necessary.

In many situations, people have both hands free and active, and the microphone is in front of their mouth. I would like to use a wireless transceiver without having to keep it in place. Supervisor Voice communication is not possible using an easily recognized microphone, such as while watching a video. It is sometimes hoped that this is possible.

Although the emphasis has been placed on voice transmission, voice communication transmitted by the person speaking is also important. It is also clearly desirable to be able to receive and immediately receive the

When a person speaks, the sound is his OLO-iarynge. Delivered to the ears via ai 5ystell+7.

Using earphones may cause sound waves to be generated in the wearer's ears and the wearer may An alternative to a microphone that detects sound carried via the Otorarinshare system. It has been proposed for the dual purpose of improving the Traditionally used earphones The frequency diffuser typically has a low impedance of 400-600 ohms at 1kHz. have a Such earphone transducers are worn under a mask. It has the advantage of being able to use both hands for free work. However, it has not been proven to be good enough, especially when used in noisy environments.

Disclosure of invention According to one aspect, the present invention: (3) Hold the microphone in or adjacent to the human's outer ear, and then earplugs applied to substantially seal air between the eardrum of the ear plug) means, and Transmitted to the eardrum via the human otoral ringer system and contained. If there is a sound wave propagating through the air, the microphone generates it in response to the sound wave propagating through the air. A circuit that conveys a signal that is transmitted or modulated: has a high impedance defined by The gist of this paper is an audio transmission system using a microphone.

an impedance corresponding to at least 1000 ohms at 1 kHz, and Preferably the microphone has an impedance greater than 2000 ohms. is meant by "high impedance".

Preferably the microphone is made individually in the wearer's ear in the style of a hearing aid earplug. It is attached by earplug means.

Increasing the sensitivity of the microphone connected to the Odora ring system It was previously believed that it only made the sound problem worse.

The present invention allows air to be trapped between the eardrum and a microphone of sufficiently high impedance. The effects of external sound and vibrations are greatly reduced when This is based on the surprising discovery that the number of people living in Japan can be reduced by half.

Obviously, a low impedance (400-800 ohm) transducer When used as a microphone, most of the detected acoustic energy is transmitted through the skeleton. as a result of which it receives noise vibrations from the normal environment. According to the present invention, high When a high-impedance microphone is used, most of the detected acoustic energy is The air is essentially transmitted from the eardrum by the column of air in the ear canal and is transmitted from the outside. The influence of vibrations within the bones is greatly reduced.

Description of preferred embodiments By way of example only, the present invention will now be described with reference to the attached schematic circuit diagram (FIG. 1). explain.

The circuit is two-way (tw) with connectors for external speakers and microphones. (oway) wireless transceiver (not disclosed) This is a Ku-face circuit.

The interface circuit in Figure 1 consists of a high impedance transducer T, two steps It uses a radio amplifier and an electronic switch, and uses a 1.5V battery as a power source. ing.

In use, terminal A1 is connected to the audio output of a wireless transceiver.

When the interlocking switch 81B is in the ``N C'' position as shown in No. 11, the ``O'' The audio signal from the transceiver connected to the audio input terminal △1 is Sent to transducer king via Den++-C8 and resistor R11 . Capacitor 08 performs DC blocking, Resistor R7 is the transducer (5) The transducer is approximately 20cm at 1kl-1z. 00 ohm impedance and was developed for use as a hearing aid. CrystalAid Proprietary Limited (CrystalAid pty, Ltd.), AP 2000 Ta obtained from Australia. I have earpieces (earpieCe).

Interlocking Sue+'Two F-8WIA/5WIB is "NO" 1i, that is, "transmission" When in mode, power is transferred to electronic switch Q1 via switch S1A and two amplification stages Q2 and Q3. Transistor Q1 is connected to PTT ("7"/-T) connected to the transceiver via terminal A3. (PLISHT.

TALK>”) line to go low.

When the switch SIB is in the °’No” position, the acoustic signal from the transducer signal is added to the base of the first amplification stage Q2. Transistor 03 is further Amplify and match impedance.

The acoustic signal is then attenuated to the desired level by variable resistor RVI and is connected to terminal A2. ° It is sent to the associated transceiver via the audio output.

As already mentioned, the earpiece is approximately 2000 ohms and preferably is made using a high impedance coil with a higher DC resistance, and It has a magnet, and the magnet is connected to either the magnet or the coil. It moves relative to the coil by means of a diaphragm mounted on the coil. Therefore, I don't like it. A microphone that modulates a signal in response to the movement of a diaphragm or It can function as an earphone when a signal is given to it.

Preferably the earpiece is the same size as the hearing aid earpiece and is A custom hollow mold, such as that often used to seal earphones to the ear. held in the wearer's ear by an object. However, the earpiece is Does it fit snugly in your ear to seal the air between the user and your eardrum? or may be shaped into other adjacent shapes.

Switch SW1 is the transducer when the transducer is used for audio transmission. serves to disconnect the acoustic reception line from the server to the transducer. . The device operates from a 1.5 liter battery, so there is no spark and can be used in hazardous environments. I can do it.

Fl is a ferrite bead for shielding. Q 1, Q2 and Q3 are each BC549 type transistors. 1st The parameters of the circuit shown in the figure, as well as the circuit itself, should be understood by those skilled in the art. may be modified in any manner that is obvious from the teachings herein.

Preferably the interface circuit is adapted to be worn on a belt. stomach.

It will be obvious to those skilled in the art that ear protection should not be used for outpatient miscellaneous purposes if necessary. It may also be worn over the earpiece to further reduce sound. Alternative implementation So (7) The microphone is assembled into the ear protection device.

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Claims (1)

[Claims] 1. Hold the microphone in or adjacent to the human outer ear, and The earplug hand is applied to substantially seal air between the head and the tympanic membrane of the ear. Dan: and Transmitted to the eardrum via the human otoral ringer system and contained. If there is a sound wave propagating through the air, the microphone generates it in response to the sound wave propagating through the air. A circuit that conveys a signal that is transmitted or modulated: has a high impedance defined by Microphone with: A voice transmission system using 2. The microphone has an input equal to at least 2000 ohms at 1kHz. 2. A device according to claim 1, having a pedance. 3. The earplug has an earpiece that is tailored to fit the wearer perfectly. An apparatus according to claim 1 or 2. 4. Does the microphone activate the wireless transceiver when in transmission mode? or to receive signal output by said transceiver when in receive mode. 4. The device according to claim 3, further comprising a circuit that can be connected to. Between the 52-stage amplifier circuit and audio transmission, the transducer is used to receive signals. 5. The device according to claim 4, further comprising a switch means for cutting off the air. 6 Apparatus substantially as herein described with respect to the drawings. (1)