Method for active feedback suppression

Details Method for active feedback suppression Method for active feedback suppression

H - Electricity

04

B

H04B 1/40 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2048644

A METHOD FOR ACTIVE FEEDBACK SUPPRESSION Abstract of the Invention A process to reduce the howl condition in a radiotelephone when the microphone picks up audio from the speaker. The condition is detected by first lowering the speaker volume (103) and measuring the michrophone volume for a corresponding decrease (104). The speaker volume is then increased (105) and the microphone volume is again measured for a corresponding increase (106). If the microphone volume follows the speaker volume, a howl condition has been detected. To eliminate the condition without the volume fluctuations being noticed by the parties conversing, the microphone and speaker volume is reduced in small increments (114) until the condition is eliminated.

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