Cochlear Implant Signal Processing ICs

Brett Swanson, Erika Van Baelen, Mark Janssens, Michael Goorevich, Tony Nygard, Koen Van Herck

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationProceedings of the IEEE 2007 Custom Integrated Circuits Conference, CICC 2007
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)1424407869, 9781424407866
Publication statusPublished - 2007
Externally publishedYes
Event29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007 - San Jose, United States
Duration: 16 Sep 200719 Sep 2007


Other29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007
Country/TerritoryUnited States
CitySan Jose


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