METHOD FOR REDUCING ECHO IN A HEARING INSTRUMENT AND HEARING INSTRUMENT
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United States of America Patent
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Issued Date -
Aug 24, 2023
app pub date -
Feb 24, 2023
filing date -
Feb 24, 2022
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Abstract
A method reduces echo in a hearing instrument. A first input transducer generates a first input signal from ambient sound. A communication unit receives an external input signal from an external device. The first input signal and the external input signal are used to generate an output signal. The output signal is used in a first filter to generate a compensation signal for reducing echo and/or acoustic feedback. The first input signal and the compensation signal are used to generate an error signal. Filter coefficients of the first filter and/or a comparison of the error signal with the compensation signal and/or with the first input signal are/is used to generate a control variable. The control variable is taken as a basis for applying a second filter for rejecting a residual echo or a residual feedback to an intermediate signal derived from the input signal, and a transmission signal is generated.
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