Energy-efficient adaptive signal decomposition: the silicon and biological cochlea

Author

Sarpeshkar, Rahul

Author_Institution

Dept. of Biol. Comput., Bell Labs., Murray Hill, NJ, USA

Volume

5

fYear

1999

fDate

1999

Firstpage

70

Abstract

We describe an analog electronic cochlea that decomposes sounds over 6 orders of magnitude in intensity into 117 channels over a frequency range of 100 Hz-10 khz while dissipating less than 0.5 mW. This cochlea has the widest dynamic range of any artificial cochlea built to date. The design, using frequency-selective automatic gain control in a low-noise traveling-wave amplifier architecture, yields insight into why the biological cochlea uses a traveling-wave mechanism to decompose sounds, instead of using bandpass filters

Keywords

adaptive signal processing; analogue processing circuits; automatic gain control; biomedical electronics; elemental semiconductors; hearing aids; silicon; travelling wave amplifiers; 0.5 mW; 100 Hz to 10 kHz; Si; analog electronic cochlea; dynamic range; energy-efficient adaptive signal decomposition; frequency-selective automatic gain control; low-noise traveling-wave amplifier architecture; sound decomposition; Adaptive filters; Band pass filters; Biology computing; Dynamic range; Energy efficiency; Frequency; Gain control; Power dissipation; Signal resolution; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.777513

Filename

777513