Patent ID: 7635047

Claim:
A hearing aid to be placed in the auditory canal of a patient, the hearing aid comprising: a standard part configured to fit near an outside of an auditory canal of a patient, the standard part comprising a rigid plastic and accommodating a microphone, an amplifier, a loudspeaker and a battery compartment; and a dedicated part configured to fit in the auditory canal, and facing an eardrum, of one of a left ear and a right ear of a patient, the dedicated part being adapted to a specific geometry of the auditory canal of one of the left ear and the right ear of the patient, wherein the dedicated part is provided with sound transmission means for the transmission of sound from said loudspeaker into the auditory canal, the sound transmission means being adapted to the specific geometry of the auditory canal, wherein the standard part has an outer end face, a surface extending across the entirety of said outer end face being symmetrically oval and having a sound aperture at the center of the surface configured to transmit sound to said microphone, and wherein said standard part is configured to connect to said dedicated part regardless of whether said dedicated part is configured to fit in the auditory canal of the left ear or the right ear of the patient.