PROBLEM TO BE SOLVED: To provide a hearing aid with extremely simple handling and without using a battery, which is easy to receive a sound desired to listen, can hear the sound naturally, and is easy to receive only a sound from the front.SOLUTION: A concave-type sound collecting hearing aid mounted to an auricle of a human body and having high directivity to a selective sound desired to listen is a structure whose size is 10-20 cm in a vertical direction of a human head, 10-15 cm in a front direction and 5-15 cm in a horizontal direction, and which has a focal point with a concave surface at an ear hole. By detaching from or attaching to the auricle, the shape of a music instrument resonance box becomes a three-dimensional noncontiguous aspheric surface structure, and the concave-type sound collecting hearing aid amplifies the sound desired to listen by removing howling of a high sound area.COPYRIGHT: (C)2013,JPO&INPIT【課題】聴きたい音を受け易くし、より自然な音で聞き取ることができ、また、前方からの音のみを受け易くし、電池を使用しないで、取扱いが極めて簡単な補聴具を提供する。【解決手段】人体の耳介に装着する選択した聴きたい音への指向性を高めた凹型集音補助具であって、人体頭部の上下方向に10~20cm、前方方向に10~15cm、水平方向に5~15cmの大きさであり、耳穴に凹面の焦点を有する構造であり、耳介に脱着または装着することにより、楽器共鳴箱の形状を3次元非連続非球面構造とし、高音域のハウリングを除去して聴きたい音を増幅させた凹型集音補聴具。【選択図】図1
