A FPGA implementation of the CAR-FAC cochlear model

Ying Xu, Chetan S. Thakur, Ram K. Singh, Tara Julia Hamilton, Runchun M. Wang, André van Schaik

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This paper presents a digital implementation of the Cascade of Asymmetric Resonators with Fast-Acting Compression (CAR-FAC) cochlear model. The CAR part simulates the basilar membrane's (BM) response to sound. The FAC part models the outer hair cell (OHC), the inner hair cell (IHC), and the medial olivocochlear efferent system functions. The FAC feeds back to the CAR by moving the poles and zeros of the CAR resonators automatically. We have implemented a 70-section, 44.1 kHz sampling rate CAR-FAC system on an Altera Cyclone V Field Programmable Gate Array (FPGA) with 18% ALM utilization by using time-multiplexing and pipeline parallelizing techniques and present measurement results here. The fully digital reconfigurable CAR-FAC system is stable, scalable, easy to use, and provides an excellent input stage to more complex machine hearing tasks such as sound localization, sound segregation, speech recognition, and so on.

LanguageEnglish
Article number198
Number of pages14
JournalFrontiers in Neuroscience
Volume12
DOIs
Publication statusPublished - 10 Apr 2018
Externally publishedYes

Fingerprint

Outer Auditory Hair Cells
Inner Auditory Hair Cells
Basilar Membrane
Sound Localization
Cyclonic Storms
Phonetics
Cochlea
Hearing
Recognition (Psychology)

Bibliographical note

Copyright the Author(s) 2018. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • neuromorphic engineering
  • electronic cochlea
  • basilar membrane
  • inner hair cell
  • outer hair cell
  • automatic gain control
  • medial olivocochlear efferent
  • FPGAs

Cite this

Xu, Y., Thakur, C. S., Singh, R. K., Hamilton, T. J., Wang, R. M., & van Schaik, A. (2018). A FPGA implementation of the CAR-FAC cochlear model. Frontiers in Neuroscience, 12, [198]. https://doi.org/10.3389/fnins.2018.00198
Xu, Ying ; Thakur, Chetan S. ; Singh, Ram K. ; Hamilton, Tara Julia ; Wang, Runchun M. ; van Schaik, André. / A FPGA implementation of the CAR-FAC cochlear model. In: Frontiers in Neuroscience. 2018 ; Vol. 12.
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A FPGA implementation of the CAR-FAC cochlear model. / Xu, Ying; Thakur, Chetan S.; Singh, Ram K.; Hamilton, Tara Julia; Wang, Runchun M.; van Schaik, André.

In: Frontiers in Neuroscience, Vol. 12, 198, 10.04.2018.

Research output: Contribution to journalArticleResearchpeer-review

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