A hearing aid is worn completely in the auditory canal to the individual form of which it is precisely adapted and it has element a body consisting of a soft material (Shore hardness A from 5 to 70). This body is the supporting element of the appliance and the components (10, 11, 12) serving the hearing...http://www.google.com/patents/US6249587?utm_source=gb-gplus-sharePatent US6249587 - Hearing aid to be worn completely in the auditory canal and individualized by a cast body
