A Modified Method for Acoustic Pulse Extraction under Noisy Environments
Menghua Cao, Zhiqiang Sun, Erling Gong, Hongwei Xie · 2016
This paper addresses a modified method of extracting acoustic pulse based on the multi-band spectral subtraction and the frequency band variance.In this method, the acoustic pulse is detected, the noise spectrum is estimated and subtracted from the acoustic pulse spectrum.By abandoning the late reverberation and decayed part of acoustic pulse, effective part of signal is obtained.Using this method, signal-to-noise ratio (SNR) is considerably improved and cross-correlation between different channels can be well optimized.