ESTIMATION OF REVERBERANT TIME USING WAVELET TRANSFORM

초록

Estimation of reverberant time is one of important factor for the calculation of absorption ration of absorption material. In general the digital filter bank has been used for the estimation of decay curve of the sound pressure in a reverberant room. However, it is not easy to get a good a linear decay curve for estimating reverberant time. Now, wavelet transform is applied to this difficult task, a good result has been obtained at low frequency. The decay curve obtained by using wavelet filter bank is better than that by using digital filter bank at low value of BT60. At large value of BT60, both curves are all good for estimating reverberant time.