| 摘要 |
Disclosed is a hearing aid which has a cerumen guard comprised of a rigid porous plastic plug adjacent to the exterior surface of the hearing aid shell. The cerumen guards may be inserted into the receiver outlet, the microphone inlet, or the vents of the hearing aid. The rigid porous plastic has a hydrophobic characteristic, a multiplicity of interconnected pores effectively avoids the accumulation and clogging of inlets, outlets, and vents by cerumen while allowing transmission of sound. Use of sintered plastic beads provide for the rigidity of the porous plastic plug. |
