An objective measure for the perceived effect of rever-beration is an essential tool for research into dereverbera-tion algorithms or acoustic space modeling. There are two different effects that contribute to the total perceived rever-beration, colouration and the reverberation tail effect. This paper presents an objective reverberation decay tail measure RDT, and measures perceptually the reverberation tail effect directly from speech. RDT uses the perceptually weighted Bark Spectral Distortion (BSD) in conjunction with an end-point search algorithm and decay tail modelling. The mea-sure was evaluated against T60 and BSD for colourless and constant colouration reverberation impulse responses. 1
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