Publications:An adaptive panoramic filter bank as a qualitative model of the filtering system of the cochlea : The peculiarities in linear and nonlinear mode

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Title An adaptive panoramic filter bank as a qualitative model of the filtering system of the cochlea : The peculiarities in linear and nonlinear mode
Author Antanas Stasiunas and Antanas Verikas and Marija Bacauskiene and Rimvydas Miliauskas
Year 2012
PublicationType Journal Paper
Journal Medical Engineering and Physics
HostPublication
Conference
DOI http://dx.doi.org/10.1016/j.medengphy.2011.07.009
Diva url http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:438933
Abstract Outer hair cells in the cochlea of the ear, together with the local structures of the basilar membrane, reticular lamina and tectorial membrane constitute the adaptive primary filters (PF) of the second order. We used them for designing a serial-parallel signal filtering system. We determined a rational number of the PF included in Gaussian channels of the system, summation weights of the output signals, and distribution of the PF along the basilar membrane. A Gaussian panoramic filter bank each channel of which consists of five PF is presented as an example. The properties of the PF, the channel and the filter bank operating in the linear and nonlinear modes are determined during adaptation and under efferent control. The results suggest that application of biological filtering principles can be useful for designing cochlear implants with new speech encoding strategies.