Abstract
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 language | English |
|---|---|
| Title of host publication | Proceedings of the IEEE 2007 Custom Integrated Circuits Conference, CICC 2007 |
| Place of Publication | Piscataway, NJ |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Pages | 437-442 |
| Number of pages | 6 |
| ISBN (Electronic) | 1424407869, 9781424407866 |
| DOIs | |
| Publication status | Published - 2007 |
| Externally published | Yes |
| Event | 29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007 - San Jose, United States Duration: 16 Sept 2007 → 19 Sept 2007 |
Other
| Other | 29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007 |
|---|---|
| Country/Territory | United States |
| City | San Jose |
| Period | 16/09/07 → 19/09/07 |