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Project Concepts Presentation ENEE 719V-2002 Neuromorphic VLSI 1. Monaural Vertical Auditory Localization 2. Visual Surveillance Chip 3. Pattern Recognition, Hebbian Learning, and floating-gates 4. Harmonicity and Spike-based Winner-take-all 5. Central Pattern Generators and Locomotion
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Monaural Vertical Auditory Localization Azimuth: Interaural Intensity Difference - (high frequencies) Interaural Time Difference - (low frequencies) Elevation: Spectral Modulation sound elevation WOB Simmons et al, 1983 Laurence and Simmons, 1982
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Lopez-Poveda & Meddis
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Chip Idea: 1. Given a microphone and pinna-like structure identify some feature In the frequency domain that is a reasonably reliable cue for elevation. Write Some MATLAB code to demonstrate this. 2. Design a neuromorphic circuit that can extract this information and report an up/down signal to drive an actively pointing microphone.
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![Spectral centroid 6 harmonics: f0 = 100Hz E.g. 1: Amplitudes: 6; 5.75; 4; 3.2; 2; 1 [(100*6)+(200*5.75)+(300*4)+(400*3.2)+(500*2 )+(600*1)] / 21.95 = 265.6Hz.](/16/5213276/big_thumb.jpg "Spectral centroid 6 harmonics: f0 = 100Hz E.g. 1: Amplitudes: 6; 5.75; 4; 3.2; 2; 1 [(100*6)+(200*5.75)+(300*4)+(400*3.2)+(500*2 )+(600*1)] / 21.95 = 265.6Hz.>")
