Abstract
There are the following problems on the subjective estimation of sound in the field of ergonomics. At first estimation of sound quality when transmitted through electrical sound reproducing system such as radio, telephone, record, magnetic tape, etc. comes into question. Frequency distortion, non-linear distortion, one-circuit sound reproducing system acoustic characteristics of listening room are the good examples included in this problem. Besides, there are the problems of subjective estimation and tolerance level of noises and the caliculation of articulation score and intelligibility of speech when transmitted through electrical sound reproducing system or among some noises. In this paper referring the previous studies we gave an outline of the problems andmethods, mentioned above, concerning the subjective estimation of sound from the viewpoint of ergonomics.
