Digital Hearing Aids Speech Enhancement Based on Microphone Array

Since it's hard for the users of digital Hearing Aids system to listen in the noise and reverberation environment, a particle filtering speech enhancement algorithm to implement the multi-channel power line carrier multiplexer is researched and an improved particle filtering algorithm based on particle swarm optimization is designed. It converts the speech enhancement problem to the estimation procedure of pure speech from the speech with noise. The particle swarm optimization method is proposed to generate the proposal distribution and make the noise reduction result closer to the pure voice, thus it will obtain better speech enhancement effect.