Speech Noise Reduction Algorithm in Digital Hearing Aids Based on an Improved Sub-band SNR Estimation

  title={Speech Noise Reduction Algorithm in Digital Hearing Aids Based on an Improved Sub-band SNR Estimation},
  author={Tao Jiang and R. Liang and Qinqyun Wang and Yongqiang Bao},
  journal={Circuits, Systems, and Signal Processing},
To improve the speech intelligibility in noisy environments for persons with hearing impairments, a new method for reducing noise, based on improved sub-band signal-to-noise ratio (SNR) estimation, is proposed. First, the input signal is decomposed into several sub-band signals with an analysis filter bank. Then, under the assumption of a Gaussian model, maximum a posterior probability is applied to estimate the information embedded in adjacent frames in each sub-band, which is in the form of a… 
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