Parametric Cochlea implemented in FPGA

N IIR filters …

MAC based filters

Parameters• Clock frequency• Sampling frequency•Number of filters (power of 2)•Input/Output/Coefficients precision.•Central frequencies.

Inputsignal Zero crossing

Energy extraction

Abs and S/H

• How many times we downsample.

…

MedianFilter

• Number of Taps for the median filter

…

Threshold/S Trigger

•Thresholds.•Delay.

Generatedevents

Thresholds

Inspired by:“Cochlear innervation in the greater horseshoe bat: Demonstration of an acoustic FOVEA.” Volkmar Bruns and Edeltraut Schmieszek (1980)