Blind Reverberation Time Estimation
Roman Scharrer, Michael Vorländer · RWTH Publications (RWTH Aachen) · 2010
This paper presents a method, which is able to give a blind estimation of the reverberation time of an enclosed space, using only the signal from two or more spatially distributed receivers, for example a binaural signal. There is no need for a controlled or known excitation signal, and there are no special requirements for the excitation signal. The method works with any kind of acoustic source, such as a speaking person, a musical instrument or a noise source. The indicator used for the reverberation time estimation is the spatial coherence and the coherence’s dependency on the block size used for the coherence calculation. Using a neural network as estimator, a unique dependency between the block size dependent spatial coherence and the reverberation time could be verified and used for reverberation time estimation.