Cochlear Implant Signal Processing ICs

The Nucleus Freedom cochlear implant system enables a profoundly deaf person to hear. The system consists of a surgically implanted stimulator and a battery-powered external sound processor. The processor is based on a 0.18 μm CMOS ASIC containing four DSP cores. The signal processing includes a two...

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Bibliographische Detailangaben
Hauptverfasser:	Swanson, B., Van Baelen, E., Janssens, M., Goorevich, M., Nygard, T., Van Herck, K.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Adaptive control Adaptive signal processing Application specific integrated circuits CMOS process Cochlear implants Deafness Digital signal processing Programmable control Signal processing Surgery
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Beschreibung
Zusammenfassung:	The Nucleus Freedom cochlear implant system enables a profoundly deaf person to hear. The system consists of a surgically implanted stimulator and a battery-powered external sound processor. The processor is based on a 0.18 μm CMOS ASIC containing four DSP cores. The signal processing includes a two-microphone adaptive beamformer, a 22-channel quadrature FFT filterbank, multi-band automatic gain control, a psycho-acoustic masking model and non-linear compression. The key design challenge was power consumption.
ISSN:	0886-5930 2152-3630
DOI:	10.1109/CICC.2007.4405768