Electrical audio signal processing systems and devices – Hearing aids – electrical
Reexamination Certificate
2005-06-28
2005-06-28
Le, Huyen D. (Department: 2643)
Electrical audio signal processing systems and devices
Hearing aids, electrical
C381S320000, C381S321000
Reexamination Certificate
active
06912289
ABSTRACT:
An improved hearing aid, and processes for adaptively processing signals therein to improve the perception of desired sounds by a user thereof. In one broad aspect, the present invention relates to a process in which one or more signal processing methods are applied to frequency band signals derived from an input digital signal. The level of each frequency band signal is computed and compared to at least one plurality of threshold values to determine which signal processing schemes are to be applied. In one embodiment of the invention, each plurality of threshold values to which levels of the frequency band signals are compared, is derived from a speech-shaped spectrum. Additional measures such as amplitude modulation or a signal index may also be employed and compared to corresponding threshold values in the determination.
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Arndt Horst
Luo Henry
Vonlanthen Andre
Bereskin & Parr
Le Huyen D.
Unitron Hearing Ltd.
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