Abstract
Presbycusis′s, hardness-of-hearing older people have a tendency to enlarge volume of television or radio etc. too much. The loud sound cause dispute between presbycusis′s and normal person, so any improvement measures is required. In this study, we propose a device which makes audio sound easy to listen for presbycusis′s without increasing volume as much as possible, using digital signal processing technology. In addition to the digital signal processing unit, two functions were implemented. One is a device which measures an auditory capacity in order to fit output sound of the device to personal aural characteristics. Another is simple operation interface for older people, includes voice navigation and graphic display.Then, the evaluation experiments of the fabricated device were conducted by cooperation of actual presbycusis′s. The improvement of audibility and the usability of the device were evaluated. As a result, the effect of developed device was found in audibility of all subjects.
