High fidelity earphone and hearing aid

Details High fidelity earphone and hearing aid High fidelity earphone and hearing aid

1986-08-28

1989-07-25

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

181135, 381 686, 381 69, 381153, 381158, 381187, H04R 110, H04R 138

Patent

active

048521779

ABSTRACT:
A high fidelity earphone or hearing aid utilizes an acoustic path from a location near where the sound is delivered to the ear, to a location near the backside of the sound-producing diaphragm. A vent to the atmosphere from a location near the backside of the sound-producing diaphragm is also taught. A microphone on the earphone makes it safe to listen to the radio or a tape player in public, because of the capability of hearing outside sounds.

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Macrae, John, "Venting Without Feedback-Further Development of the High Cut Cavity Vent", Hearing Instruments, vol. 33, Apr. 1982, pp. 12 and 30.

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