Purpose To study the perceptual consequences of changes in parameters of vocoded
speech in various reverberation conditions. Method The 3 controlled variables were number
of vocoder bands, instantaneous frequency change rate, and reverberation conditions. The
effects were quantified in terms of (a) nonsense words' recognition scores for young normal-
hearing listeners,(b) ease of listening based on the time of response (response delay), and
(c) the subjective measure of difficulty (10-degree scale). Results It has been shown that the …

The perceptual consequence of change in parameters of vocoded speech for various
reverberation conditions has been examined. The three controlled variables were: number
of bands, instantaneous frequency changes rate and reverberation conditions. The effects
were quantified in terms of:(a) non-words' recognition scores for young normal-hearing
listeners,(b)“ease of listening” based on the time of reaction (response delay) and (c) the
subjective measure of difficulty (ten-degree scale). The results have shown that the fine …