Psychological impression and listening score while listening to audio signal under meaningless steady noise

The indices for evaluating psychological impression and listening score are first introduced in the case of listening to a Japanese monosyllabic audio signal while subjected to meaningless steady noise. Hereupon, the mutual relationship between the power spectrum level of audio signal and that of external noise is reflected in the above evaluation indices. Next, estimation and/or prediction problems of the psychological impression and listening score are discussed. The predicted values of the psychological impression and listening score are compared with the experimental observed data. A useful index is discussed, considering consistency between predicted and observed values.