JPH01284128A - Received sound amplification system for moving body - Google Patents

Abstract

PURPOSE:To receive the sound of a signal level to overcome a external noise through a receiver by gain-controlling automatically a received sound signal level in direct proportion to the magnitude of the external noise. CONSTITUTION:The external noise in which a moving body 1 during communication is placed is collected by a microphone 7, and is amplified by a noise amplifier 8, and an automatic amplification gain control circuit 9 makes the amplification gain of the received sound to pass through a received sound amplifier 6 change automatically in direct proportion to an inputted noise signal level, and transfers it to the receiver 10. Accordingly, at the receiver 10, the received sound amplified in direct proportion to the magnitude of the external noise is obtained. Thus, even at the place where the magnitude of the external noise in which the moving body 1 is placed changes violently, the sound of the remote party of communication can be heard without being disturbed by the external noise.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a received audio amplification method for a mobile body that automatically amplifies a received audio signal.

[Conventional technology]

In conventional wireless switching systems, the amplification gain of the received voice signal of the mobile unit is always constant during a call, or the gain amount is adjusted by manually operating the gain setting switch. It was designed to increase the number of

[Problem to be solved by the invention]

In the above-mentioned conventional radio-based switching system, the received voice amplification method of the mobile unit has a fixed amplification gain of the received voice signal.
Since it is configured to be manually adjusted, when a user is on a call in a place where a moving object is located where the level of external noise changes drastically, the voice of the other party is prevented from being harmed by the external noise, making it difficult to hear and receive. It had some serious drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a received audio amplification method for a mobile object that solves the above-mentioned drawbacks by having a microphone that collects external noise and controlling the amplification gain of the reception level of the received audio according to the level of the external noise. [Means for Solving the Problems] The automatic amplification system for the received voice of a mobile body according to the present invention includes a microphone that collects noise from outside the mobile body when the mobile body is in a talking state, and a microphone that collects noise from the outside of the mobile body, and a noise level amplifier that amplifies the noise signal collected by the mobile unit; and an automatic amplification gain control circuit that automatically controls the amplification gain of the voice signal received by the mobile unit during the call state in direct proportion to the magnitude of the external noise level. , and a receiving audio amplifier controlled by the automatic amplification gain control circuit.

〔Example〕

Next, the present invention will be explained with reference to Figure (3).
The figure is a 7-degree view showing one embodiment of the present invention.

The mobile body 1 in the talking state connects the received audio signal received by the antenna 2 to the receiving audio amplifier 6 via the transmitting/receiving circuit 3, the logic circuit 4, and the control unit 5. The external noise of the moving object during a call is detected by microphone 7.
, and then amplified by a noise intensifier 8. The signal amplified by this noise amplifier 8 is transmitted to an automatic amplification gain control circuit 9.
@Amplification gain automatic control circuit 9 reaches receiving audio amplifier 6
The amplification gain of the received voice passing through is automatically changed in direct proportion to the manually input noise signal level, and the amplification gain is transferred to the receiver IO. Therefore, the handset 10 receives amplified audio in direct proportion to the magnitude of the external noise.

The transmitter 11 transmits the transmission audio signal via the control unit 5, the logic circuit 4, the transmitter/receiver circuit 3, and the antenna 2. [Effects of the Invention] As described above, the present invention is applicable to a mobile unit of a wireless switching system. During a call, the receiving audio signal level is automatically gain-controlled in direct proportion to the level of external noise to which the mobile unit is exposed, so that the receiver receives audio at a signal level that overcomes the external noise. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a received audio amplification method for a mobile object according to the present invention. 1...mobile object, 2...group/antenna, 3...
...Transmission/reception circuit, 4...Logic circuit, 5.
...Control unit, 6...Receiving audio amplifier, 7...Microphone, 8...Noise level amplifier, 9...Amplification gain automatic control circuit,
10...Telephone receiver, 11...Telephone receiver. vulgarity

Claims (1)

[Claims] A receiving voice amplification method for a mobile body in a wireless exchange system includes: a microphone that collects noise outside the mobile body when the mobile body is in a talking state; a noise level amplifier that amplifies the noise signal collected by the microphone; An automatic amplification gain control circuit that automatically controls the amplification gain of a voice signal received by the body during a call in direct proportion to the magnitude of an external noise level, and a reception audio amplifier controlled by the automatic amplification gain control circuit. 1. A received audio amplification method for a mobile body, characterized by having the following.