A PRACTICAL PREDICTION METHOD OF PSYCHOLOGICAL RESPONSE TO ARBITRARY NONWHITE RANDOM NOISE BASED ON SIMPLIFIED PATTERNS OF MEMBERSHIP FUNCTIONS

In psychological noise evaluation, the fuzziness caused by the human s ubjective judgment for the acoustical stimulus essentially exists, By paying special attention to the fuzziness of the subjective impression , the categorized psychological evaluation is grasped quantitatively a s the fuzzy event. That is, the so-called membership function in the f ield of fuzzy set theory is used as a method for discussing the relati onship between the objective acoustical stimulus and the subjective hu man response. The set of eight simplified patterns of membership funct ions is first established by using the data obtained from an actual ps ychological experiment in the case when the test subjects are exposed to the octave-band-limited white noise with center frequency f(cK) (K = 1, 2, ..., 8). Next, the membership functions for the psychological impression are estimated by use of the above set of eight simplified p atterns, in a case when the test subjects are exposed to art arbitrary non-white random noise. Further, a method for evaluating the psycholo gical response is proposed by using the concept of the fuzzy probabili ty. Finally, the validity and the usefulness of the proposed method ar e confirmed experimentally by applying it to the actually observed dat a. Copyright (C) 1996 Elsevier Science Ltd