In the ear hearing aid having extraction tube which reduces acou

Details In the ear hearing aid having extraction tube which reduces acou In the ear hearing aid having extraction tube which reduces acou

1992-05-27

1995-03-07

Kuntz, Curtis

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 69, 379 52, H04R 2500

Patent

active

053951689

ABSTRACT:
An in-the-ear canal hearing aid comprises a housing which accommodates a microphone, an amplifier and an electromechanical transducer (for example, of a telephone) which are electrically coupled together in cascade. The hearing aid further includes an extraction element for extracting the hearing aid from the ear canal. The extraction element is in the form of a hollow tube having one end mechanically attached to the housing of the hearing aid at such a position that the channel in the tube is acoustically coupled to the sound entrance of the hearing aid. As a result, a second function of the extraction element is the suppression of acoustic feedback.

REFERENCES:
patent: 2544027 (1951-03-01), King
patent: 2659772 (1953-11-01), O'Hara
patent: 2910679 (1959-10-01), Baldwin
patent: 4852177 (1989-07-01), Ambrose
patent: 5022486 (1991-06-01), Miura et al.
patent: 5048090 (1991-09-01), Geers
patent: 5101435 (1992-03-01), Carlson

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