Detection for the early reflection in the impulse response by the correlation function
Toru Itakura, Yong Tang, Wakako Tanaka, Hideo Shibayama · The Journal of the Acoustical Society of America · 2006
Detecting an early reflection sound contained in the impulse response measured in a room, we calculated the correlation factor between the early reflection and the impulse response. Calculating the correlation factor every sampling period, we make the correlation function. For the function, we set a threshold level. We detected the absolute correlation value larger than the threshold level. And, we set the zero value for subthreshold level. Following this algorithm, we generate a new signal with the high correlation factor for the early reflection. We compared the signal with the impulse response by using listening test.