SOUND LISTENING ABILITY EVALUATION DEVICE AND SOUND LISTENING INDEX CALCULATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sound listening ability evaluation device in which variations of test results are reduced and test can be performed in a short time even if the sound of relatively short time length is used.;SOLUTION: In a sound listening ability evaluation device 1, a subject data identification part 18 specifies the S/N ratio of sound to non-stationary noise in a "threshold of sound intelligibility" of a subject at the time when non-stationary noise is loaded in the sound of a predetermined time length. This non-stationary noise is the noise obtained by performing amplitude modulation of steady noise using a sine wave of single frequency fixed in the predetermined time length. Then, an evaluation part 19 evaluates sound listening ability based on the S/N ratio specified by the subject data identification part 18.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT