I review what we have learned about the BLR from reverberation mapping, point to some problems and complications that have emerged, and outline some future directions.

In the field of room acoustics, it is well known that reverberation can be characterized statistically in a particular region of the time-frequency domain (after the mixing time and above Schroeder’s frequency). Since the 1950s, various formulas have been established, focusing on particular aspects of reverberation: exponential decay over time, correlations between frequencies, correlations bet...

To overcome the problems related with the long impulse responses produced by reverberation, we use a long time window (high frequency resolution) analysis during the channel normalization steps of the feature extraction process in automatic speech recognition (ASR). After nor-malization, a trade between frequency and time resolution is used to increase the rate at which the time information is ...

Room impulse responses(RIRs) have conventionally been used to derive acoustic parameters to assess acoustics of rooms. One of these parameters is reverberation time which is taken as a crucial measure for perceptual reverberance. Although this measure is not perfect on evaluation reverberance in many situations, especially when the sound decays are not exponential. This study investigates the r...

To overcome the problems related with the long impulse responses produced by reverberation, we use a long time window (high frequency resolution) analysis during the channel normalization steps of the feature extraction process in automatic speech recognition (ASR). After nor-malization, a trade between frequency and time resolution is used to increase the rate at which the time information is ...

Reverberation from rough ocean boundaries often degrades the performance of active sonar systems in the ocean. The focusing capability of the time-reversal method provides a new approach to this problem. A time reversal mirror (TRM) focuses acoustic energy on a target enhancing the target echo while shadowing the boundaries below and above the focus in a waveguide, thereby reducing reverberatio...