Patent ID: RE40696

Claim:
An insert earphone comprising: a unitary housing having a hollow body portion, the hollow body portion having an end wall and an open end disposed opposite the end wall and a hollow elongated tubular portion extending from the end wall; an end cap; a cable including a plurality of electrical conductors extending from an electrical audio signal source external to the housing, the cable being secured with the end cap, the end cap connected to cover the open end of the hollow body portion; a receiver for transducing electrical energy received along the plurality of electrical conductors to sound energy, the receiver being supported within the hollow body portion of the housing and having a sound outlet port extending partially into the hollow elongated tubular portion of the housing in a closely conforming manner; an insert formed from a resilient material, the insert being disposed between the receiver and at least one interior wall of the unitary housing to inhibit movement of the receiver within the hollow body portion and assisting to provide an acoustic seal between the hollow body portion and the elongated tubular portion; a damper supported within the hollow elongated tubular portion of the housing at a position opposite the sound outlet port of the receiver, sound from the sound outlet port of the receiver being conducted to the damper by the hollow elongated tubular portion; a resilient sealing member disposed over the hollow elongated tubular portion for sealing with an ear canal of a wearer; the earphone extending into and substantially acoustically sealing the ear canal of the wearer where inserted, the damper and receiver response compensating for loss of external ear resonance and coupling resonance that otherwise would occur when the insert earphone is inserted into the ear canal of the wearer to thereby assist in providing a high fidelity response.