Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit
Reexamination Certificate
2006-04-25
2010-11-30
Ensey, Brian (Department: 2614)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Noise compensation circuit
C381S312000, C381S317000, C381S083000, C381S093000, C381S096000
Reexamination Certificate
active
07844063
ABSTRACT:
Hearing aids with microphone and telephone coil are to be made simpler and more convenient. For this purpose it is provided to use an adaptive filter to compensate acoustic and electromagnetic feedback. In order to allow for the propagation delay differences, a delay element is connected downstream of the telephone coil. The microphone and telephone coil signals can be individually weighted with the factors a and b so that mixed mode is also possible.
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Hamacher Volkmar
Puder Henning
Ensey Brian
Joshi Sunita
Siemens Audiologische Technik GmbH
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