Study on the perception of nonlinguistic information of noise-vocoded speech under noise and/or reverberation conditions

It has been known that noise and reverberation greatly affect the perception of linguistic information, in particular speech intelligibility. However, effect on non-linguistic information not clarified. We investigated how these types disturbances (speaker individuality vocal emotion) noise-vocoded speech. conducted speaker-distinction vocal-emotion-recognition experiments using created from noisy, reverberation, noisy reverberant environments as stimuli. used seven conditions (signal-to-noise ratio (SNR) = ∞,20,15,10,5,0,−5 dB) six (reverberation time (TR) 0.0,0.1,0.3,0.5,1.0,2.0 s). In both experiments, main effects were significant, but interaction was significant. From results, except for extremely poor sound conditions, under daily (an SNR more than 10 dB TR less 1.0 s), there no significant reverberation.