Receiver housing for hearing aid i.e. in-the-ear hearing aid, has opening for barometric pressure balance of sound channel and covered by air permeable material such as air permeable membrane or tiling or porous material

摘要

The housing has an opening for barometric pressure balance of a sound channel and covered by an air permeable material, where the air permeable material is an air permeable membrane or a tiling or porous material i.e. Gore-Tex(RTM: waterproof/breathable fabric).