64 Channel Digital Hearing Aid Emdedded Firmware
Soon-Suck Jarng, Mano Samuel, Je-Hyung Lee · 2011
This paper presents some results of a 64 channel digital hearing aid firmware development. Along with nonlinear voice compression, we present noise reduction, microphone & receiver calibration and in-situ algorithms with some results. The FFT-iFFT based compression method can generalize the nonlinear arbitrary compression scheme in connection with spectral noise reduction scheme. Spectral subtraction method was used for noise reduction, but noise spectrum was continuously updated by detecting signal level.