Interphone capable of solving short-distance call squeal and method for solving squeal

Abstract

The invention provides an interphone for solving short-distance call squeal, which comprises an interphone body, wherein a main control board is arranged in the interphone body; the main control boardcomprises a receiving circuit unit, a signal intensity detecting unit, an MCU control unit and an audio output power control unit, wherein the receiving circuit unit is used for receiving a signal transmitted by the transmitting interphone; the signal intensity detecting unit is used for calculating the signal intensity; the MCU control unit is used for judging the size of the signal intensity; the audio output power control unit is used for controlling audio output power; the receiving circuit unit is connected with the signal intensity detecting unit; the signal intensity detecting unit isconnected with the MCU control unit; and the MCU control unit is connected with the audio output power control unit. According to the interphone and the method in the invention, the intensity of the received signal is detected to adjust the audio output power of the interphone so as to solve the problems of short-distance squeal and long-distance large volume. When two interphones are used for short-distance talkback, the intensity of the signal received by the receiving interphone is high; and the problem of short-distance squeal is solved through a mode of reducing the audio output power.

Description

technical field [0001] The invention relates to the field of communication, in particular to an intercom capable of solving howling in close-distance calls and a method for solving howling. Background technique [0002] During the use of the walkie-talkie, when the distance between the two walkie-talkies is relatively close, the sound from the speaker of the receiving device will be sent back to the microphone of the transmitting device, forming self-excitation, causing the receiving device to howl. At present, in order to solve this problem, it is necessary to balance the gain of the entire sound link by limiting the microphone gain of the transmitting intercom or the speaker power of the receiving intercom to avoid howling at close range. However, by simply reducing the microphone gain of the transmitting intercom or the speaker power of the receiving intercom, although the short-distance howling problem is solved, it affects the long-distance call quality and limits the m...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a walkie-talkie capable of solving howling in close-distance calls and a method for solving howling, and its main purpose is to overcome the problem of poor howling effect between existing walkie-talkies

Images