Patent ID: 7756285

Claim:
A hearing aid, comprising: a microphone that receives incident sound waves from one or more sources external to the hearing aid, and converts the sound waves into electronic signals; a circuit that amplifies the electronic signals; a receiver that converts the amplified electronic signals into amplified sound waves; and a tuned resonant cavity between the microphone and the at least one external sound source, at least one of the following parameters of the tuned resonant cavity being selected to modify the frequency response of the incident sound waves before the sound waves are received by the microphone: a geometry of one or more openings through which sound waves enter the cavity, the geometry of the cavity, and the geometry of one or more openings through which sound waves exit the cavity, the tuned resonant cavity modifying the frequency response of the incident sound waves by increasing the amplitudes of higher frequency sounds relative to lower frequency sounds within the incident sound waves.