PROBLEM TO BE SOLVED: To provide a sound absorbing transmitted sound conveying ear plug that can reproduce low, medium and high frequency sounds heard by hearing-impaired persons in their everyday life and found detrimental to their health into normal, natural and soft sounds audible to them.SOLUTION: A sound absorbing type transmitted sound conveying ear plug 1 is equipped with an external acoustic opening sponge 2 that can be inserted into an external acoustic opening and held therein, and an acoustic plate A3 in contact with an externally open end face of the external acoustic opening sponge 2, shaped to match the shape of the same face of the end of the external acoustic opening and stuck to it. The ear plug 1 can prevent sounds from diffraction by clogging the ear hole open outside with the acoustic plate A3. Also, the acoustic plate A3 converts sound wave energy into thermal energy to reduce the reverberation of the sound. Therefore, the ear plug 1 can convey only transmitted sounds from the external auditory canal to the eardrum.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】 難聴者が日常生活において聴く、体に障る低周波音・中周波音・高周波音の音を、本来の自然な柔らかい音として再現し、それを聴き取ることが出来る、吸音型透過音式耳栓を提供する事を課題とする。【解決手段】吸音型透過音式耳栓1は、外耳孔と相似の形に成形し、外耳孔に挿入保持することが出来る外耳孔スポンジ2と、その外耳孔スポンジ2の外部に面した端面に接し、外耳孔端部の同一面の形状に合せ、成形した吸音板A3を備え、これを接着したもので構成する。同耳栓1は吸音板A3が耳の外部に開かれた孔を塞ぐことによって音の回折を防ぐことができ、又、吸音板A3は音波のエネルギーを熱エネルギーに変換し、響きを低減させる。よって同耳栓1は透過音だけを外耳道から鼓膜へ伝えることが可能である。【選択図】図2
