A FPGA Implementation of the CAR-FAC Cochlear Model.

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.

journal_name

Front Neurosci

authors

Xu Y,Thakur CS,Singh RK,Hamilton TJ,Wang RM,van Schaik A

doi

10.3389/fnins.2018.00198

subject

Has Abstract

pub_date

2018-04-10 00:00:00

pages

198

eissn

1662-4548

issn

1662-453X

journal_volume

12

pub_type

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