Title :
FPGA active digital cochlea model
Author :
Mugliette, Christian ; Grech, Ivan ; Casha, Owen ; Gatt, Edward ; Micallef, Joseph
Author_Institution :
Dept. of Microelectron. & Nanoelectron., Univ. of Malta, Msida, Malta
Abstract :
Hearing is one of the senses of the human being and and is performed by the auditory system consisting of the outer and middle ear, cochlea (inner ear) and auditory cortex in the brain. The functionality of the cochlea is to process non-linear travelling wave and give information to the brain to perform tasks such as speech recognition and cross correlation of the incoming sound. This paper presents a model of a dual channel human cochlea embedded in a Xilinx XC3S500E, each consisting of a cascade of digital IIR low-pass filters. The filters are based on dual fixed point arithmetic. The model also integrates automatic gain control which mimics the functionality of the outer hair cells (OHCs), as well as the sensing mechanism involved in the inner hair cells (IHCs) of biological cochlea.
Keywords :
IIR filters; automatic gain control; brain; ear; field programmable gate arrays; fixed point arithmetic; hearing; low-pass filters; neurophysiology; speech recognition; FPGA active digital cochlea model; Xilinx XC3S500E; auditory cortex; auditory system; automatic gain control; brain; digital IIR low-pass filters; dual channel human cochlea; dual fixed point arithmetic; ear; hearing; inner hair cells; nonlinear travelling wave; outer hair cells; speech recognition; Biological system modeling; Cutoff frequency; Digital filters; Field programmable gate arrays; Gain control; Humans; IIR filters; Automatic Gain Control; Cochlea model; Human Auditory System; Inner Hair Cell (IHC); Outer Hair Cell (OHC);
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2011 18th IEEE International Conference on
Conference_Location :
Beirut
Print_ISBN :
978-1-4577-1845-8
Electronic_ISBN :
978-1-4577-1844-1
DOI :
10.1109/ICECS.2011.6122370
