Abstract: A hearing aid includes a first portion adapted for behind-the-ear placement having a microphone, a second portion adapted for in-the-canal placement having a receiver and a cable that couples the first portion to the second portion, the cable having an adjustable length.

Abstract: A hearing instrument may include an enclosure adapted for behind-the-ear placement that houses a microphone for converting an acoustical input signal to an electrical signal and a sound processing circuit for processing the electrical signal; an earpiece adapted for in-the-canal placement that includes a receiver for converting the processed electrical signal to an acoustical output signal; a replaceable battery housed in the enclosure for powering the microphone, sound processing circuit and receiver; and an electrical cable extending from the enclosure that electrically couples the processed electrical signal from the sound processing circuit to the receiver. The enclosure includes a top portion and a bottom portion. The top portion and the bottom portion pivot about a hinge point at one end of the enclosure to open and closed positions. In the open position, the battery is accessible for replacement.

Abstract: A wax-resistant earpiece tip has one or more sound openings and a torturous path to inhibit wax from reaching a receiver mountable therein. The tip may further include a folded acoustical horn. A chamber may be formed in the tip to collect debris. The tip may include a stop bar to prevent the tip from collapsing against a receiver sound port.

Abstract: A hearing aid comprises 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 parameter of the tuned resonant cavity is selected to modify the frequency response of the incident sound waves that are received by the microphone. In particular, the geometry of one or more openings through which sound waves enter the chamber, the geometry of the chamber itself, and/or the geometry of one or more openings through which sound waves exit the chamber, are selected to condition the incident sound waves by modifying the frequency response of the audio signal prior to the signal being received at the microphone.

Abstract: A hearing aid includes a first portion adapted for behind-the-ear placement having a microphone, a second portion adapted for in-the-canal placement having a receiver and a cable that couples the first portion to the second portion, the cable having an adjustable length.

Abstract: A hearing aid comprises 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 parameter of the tuned resonant cavity is selected to modify the frequency response of the incident sound waves that are received by the microphone. In particular, the geometry of one or more openings through which sound waves enter the chamber, the geometry of the chamber itself, and/or the geometry of one or more openings through which sound waves exit the chamber, are selected to condition the incident sound waves by modifying the frequency response of the audio signal prior to the signal being received at the microphone.