A Study on Noise Reduction for Digital Hearing Aids Using Microphone Array in a Car Noise Environment
Hyundeok Kang, Dong-hyeouck Bang, Se-Kee Kil, Sangmin Lee · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2009
This paper describes noise reduction on the time and frequency domain using three microphones for digital hearing aids in a car noise environment. We evaluated the results after the noise reduction by PESQ (Perceptual Evaluation of Speech Quality) in order to compare the original signal with the signal after the noise reduction processing. We didn't make the energy of noise regions zero and left the appropriate amount so that people would not feel uncomfortable hearing. The result showed that PESQ-MOS score increase an average of 2.127.