Electrical audio signal processing systems and devices – Hearing aids – electrical
Reexamination Certificate
2008-07-29
2008-07-29
Le, Huyen D (Department: 2615)
Electrical audio signal processing systems and devices
Hearing aids, electrical
C381S328000
Reexamination Certificate
active
07406179
ABSTRACT:
A hearing instrument system detects the insertion or removal of a hearing instrument into a space and includes first and second acoustic transducers, first and second level detection circuitry, and signal processing circuitry. The first acoustic transducer receives a first electrical signal and in response radiates acoustic energy, and the second acoustic transducer receives radiated acoustic energy and in response generates a second electrical signal. The first level detection circuitry is operable to receive the first electrical signal and generate a first intensity signal, and the second level detection circuitry is operable to receive the second electrical signal and generate a second intensity signal. The signal processing circuitry is operable to receive the first and second intensity signals and compare the first and second intensity signals and determine whether the hearing instrument is inserted into the space or removed from the space based on the comparison.
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European Search Report dated Feb. 3, 2006.
Le Huyen D
Sound Design Technologies, Ltd.
Van Dyke Gardner, Linn & Burkhart, LLP
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