The effect of interest in speech on psychological response to external noise

The relationship between the human psychological response to external noise when listening to interesting speech and to uninteresting speech is first considered by using membership functions established from observed data. The fuzzy relation between the sound pressure level of the speech and that of the external noise is estimated approximately by univariate membership functions established on the universe of the signal-to-noise ratio. Next, a method for evaluating the psychological response by using the concept of fuzzy probability is proposed. Finally, the validity of the evaluation method is experimentally confirmed by applying it to observed data. © 2000 Scripta Technica, Electron Comm Jpn Pt 3, 83(9): 111–120, 2000