Noise reduction architecture in monaural hearing aids
Merlin Revathy S., Sindhu N., Sruthi B.R. · 2016
The paper introduces an adaptive gain algorithm in which the introduced gain is adaptive to noisy speech signal and frequency channels. The adaptive gain algorithm is a cascaded version of Signal-to-noise ratio based gain and insertion gain. In this paper two combinations of adaptive filtering and adaptive gain algorithms are put forward namely single channel cascaded NR scheme and multi channel cascaded NR scheme. The adaptive filter is implemented using either wiener or Kalman filter. Multi channel cascaded NR using Kalman filter shows consistent performance under all input and test conditions. Hence it can be considered as a practical solution for noise removal in monaural hearing aids.