A consideration of psychological impressions and listening score when listening to audio signals composed of monosyllables and words, while subject to meaningless steady noise

摘要

The authors discuss a useful index for evaluating two psychological impressions: annoyance caused by the noise and speech audibility of an audio signal, and the listening score when listening to audio signals composed of monosyllables and words while subject to meaningless steady noise. More specifically, eight evaluation indices (SN, AI, SIL, WSPD, ...) are introduced that reflect the mutual relationships between the spectrum level of the speech peaks and that of the noise. After careful consideration of the relationship between these indices and the above three aspects, WSPD can be selected as a useful index. Next, an estimation and/or prediction problems of the two psychological impressions of noise and audio signal and the listening score of audio signal are considered.