Intelligent telephone amplifier for eliminating feedback whistle, and suppressing interference noise

Abstract

The invention provides an intelligent telephone repeater capable of eliminating feedback howling, inhibiting disturbance noise and enabling receiving and transmitting signals simultaneously asymmetric amplification belonging to the communication appliance field. The repeater comprises a receiving end and a transmitting end. A repeater transmitting level sampling circuit and a receiving level sampling circuit are accessed to an asymmetry function intelligent control module circuit through a level comparing module, connected to the telephone main machine transmitting end through a transmitting channel amplifying circuit and feedbacked to the transmitting level sampling circuit; the asymmetry function intelligent control module circuit is connected to a telephone handle earphone through a receiving channel amplifying circuit and a power amplifying circuit and feedbacked to the receiving level sampling circuit. The invention completely eliminates the singing and howling in the communication, enables the amplification of receiving channel to vary from 1 to 200 and that of the transmitting channel corresponding from 100 to 1. The invention automatically inhibits briefness sudden type and constant stable noise, and automatically changes the telephone to be a direct connection state when the noise strength is too large.

Description

technical field [0001] The invention relates to the field of communication equipment, in particular to an asymmetric function type intelligent duplex telephone loudspeaker. Background technique [0002] Due to the lack of clinical experience in the middle and late stages of the last century, excessive use of antibiotics (ototoxicity is ranked as gentamicin, streptomycin, neomycin. .. ), and the lack of awareness of environmental noise-induced sensorineural deafness, resulting in an increasing number of elderly and non-elderly deaf people. According to estimates from the medical department, by the end of 2007, the number of people in the country had reached 20.57 million. There is a certain demand for telephone boosters (loud telephones) in society. There have been telephone sound amplifiers produced in Shenzhen (Chinese patent ZL200620034811) on the market, and the loud telephones produced in Germany and Japan have been out of stock. The reason is that they have withdrawn f...

AI Technical Summary

Problems solved by technology

What it provides is a time-division duplex mode amplifier, but it cannot speak and listen to the other party's speech at the same time

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