3406 中途失明者を対象とした障害物検知のためのサウンドデザイン : 体の向きが変更不可の場合の実験(S72 生物医学工学における計測と制御,S72 生物医学工学における計測と制御)

抄録

Some of congenital blind persons recognize obstacles and surrounding environment by sounds. But it is relatively difficult for the blind who lost their sight posteriorly to acquire this ability because they don't have long acoustic training. This research intended them and examined the sounds which are easy to recognize obstacles. We carried out the experiment of pointing to no wall using a white cane or artificial sounds of different lengths or frequencies against some sighted people wearing an eye mask. We measured the angle of pointing to no wall and the time from starting to sound and estimated them. We found that the lengths of the sounds, which were suitable for intending obstacles, were long sounds about 800ms in the case of low frequency or short sounds about 50〜100ms in the case of high frequency.