시간-스케일필터를 이용한 기적음 도달시간차 측정성능의 개선

Performance Enhancement of Time Delay Measurement of Whistle Sound using Time-Scale Filter

  A purpose of developing a sound source tracking system in this paper is to reduce the noise efficiently from the received signal by microphone array and measure the signal"s time delay between the microphones. We have applied the wavelet analysis algorithm to the system and calculated the sound source"s relative position. For the performance evaluation, I have compared with the results of utilizing the digital filtering methods based on the FIR LPF using Kaiser window function and the inverse Chebyshev ⅡR LPF. As a result, I have confirmed the fact that ‘time-scale" filter using inverse discrete wavelet transform was suitable for this system.