A method for forming a standardized faceplate for an individually adapted in-the-ear hearing aid shell which matches the physical characteristics of the hearing aid user's ear, and for fabricating an individually-adapted in-the-ear hearing aid shell made of radiation-reactive material and a battery...http://www.google.fr/patents/US5781637?utm_source=gb-gplus-shareBrevet US5781637 - Method for fabricating a hearing aid faceplate and a faceplate produced thereby
Method for fabricating a hearing aid faceplate and a faceplate produced ...
