A computational model of the auditory periphery
Summarize peripheral auditory physiology
A systems model of the auditory periphery
What properties should the filter bank have?
Possible filter properties
Modelling the hair cell/auditory nerve synapse
Create a spectrogram with ‘ear-like’ processing (Giguere & Woodland, 1993) (typical spectrogram properties in italics)
An auditory spectrogram
Psychoacoustic reflections of auditory frequency selectivity
Masking experiments
The frequency specificity of masking
Psychophysical tuning curves Determine the minimum level of a narrow-band masker at a wide variety of frequencies that will just mask a fixed sinusoidal probe.
The band-widening experiment
The notion of the critical band as seen in band-widening experiments
Notched-noise masking controls ‘off-place’ listening
Typical results at one level, and a fitted auditory filter shape
Measure across level, and assume filter linearity at frequencies substantially lower than CF
A masked audiogram For a fixed narrow-band masker, determine the change in threshold for sinusoidal probes at a wide variety of frequencies.
Other auditory abilities also reflect frequency selectivity
Sensitivity to phase in tonal complexes
Minimal detectable modulating frequency in AM-QFM complexes as a function of carrier frequency
PPT Slide
The End
Email: stuart@phon.ucl.ac.uk
Home Page: http://www.phon.ucl.ac.uk/home/stuart/home.htm
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