H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 25/00 (2006.01)
Patent
CA 2240051
A hearing aid has a microphone (1), or other electromechanical transducer, for converting an acoustic input signal into an electrical signal, a signal-processing and amplifying signal path (2, 3, 13, 4, 5, 6) and an output converter (7) whichconverts the amplified electrical signals back into acoustic signals, or in the case of an implanted hearing aid into mechanical signals, and a feedback digital finite impulse response filter (FIR filter) (9) for compensation of unwanted feedback (8) from the output converter to the microphone, in which the filter coefficients of filter (9) are determined by feeding a short pulse into the feedback signal path (5, 6, 7, 1, 2) and directly measuring the impulse response of this signal path.
Delfs Hans
Leysieffer Hans
Cochlear Limited
Implex Gmbh Spezialhorgerate
Mcfadden Fincham
LandOfFree
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