Abstract
The object of this paper is to evaluate the personal auditory characteristics of loudness by use of many kinds of intermittent noises. First, in order to investigate auditory temporal resolutions for subjects, post masking levels have been measured. As the result of this measurement, the elder subjects have the tendency of higher post masking levels. Next, by use of intermittent noises with different pause durations, the relationship between post masking levels and loudness has been examined. As the result of this experiment, the effect of post masking levels on loudness is observed. This effect is more positive according to long pause durations of intermittent noises. In addition to this, by use of intermittent noises with different sounding durations, the experiment to examine the relation between auditory excitation and loudness level has been conducted. As the result of this experiment, the subjects who have the weekness of auditory excitation tend to estimate the loudness level of those intermittent noises less than the Equivalent Sound Level (hereinafter E. S. L.). Finally, by use of intermittent noises with the same value of E. S. L., the experiment has been conducted. As the result of this, the subjects who have high post masking levels and sharp auditory excitation levels estimate the loudness of these noises louder than the E. S. L.
