Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2006-11-14
2006-11-14
Pezzuto, Robert E. (Department: 3766)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S055000, C607S056000
Reexamination Certificate
active
07136706
ABSTRACT:
An implantable neural stimulation system, such as a cochlear implant system, utilizes a Distributed Compression Amplitude Mapping (DCAM) system to distribute signal compression between a pre-bandpass linear mapping function, and a post-bandpass compressive mapping function. The pre-bandpass linear mapping function is implemented, in one embodiment, as a traditional fast audio compressor to prevent distortion that might result from a non-linear mapping. The post-bandpass compressive mapping function is implemented, in one embodiment, as a logarithmic transform to reflect natural hearing. As a result of the DCAM processing, the differences in amplitudes of components of the acoustic spectrum are maintained. By maintaining these differences, spectral smearing between channels is reduced and speech clues are preserved.
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Advanced Bionics Corporation
Gold Bryant R.
Heller Tammie K.
Poissant Victoria A.
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