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SUMMARY:Iterative shaping of signal envelopes: a useful tool for hearing r
 esearch? - Richard Turner
DTSTART:20141015T120000Z
DTEND:20141015T130000Z
UID:TALK55505@talks.cam.ac.uk
CONTACT:Dr R.E. Turner
DESCRIPTION:I will present some thought provoking preliminary results that
  shed light on a long-running debate in the hearing community.  The debate
  can be traced back to a simple question: what information is carried in t
 he firing rate of auditory nerve fibres and what information is carried in
  the precise timings of action potentials? The firing rates of auditory ne
 rve fibres appear to encode the sub-band envelopes of sounds whereas the t
 iming information appears to encode the carriers\, or fine structure\, hen
 ce the moniker the "envelope and fine-structure debate". I will propose a 
 new approach to understanding this debate which is to iteratively shape a 
 signal using an optimisation procedure so that it has the same sub-band en
 velope properties as a target sound. This enable us to assess what percept
 ual information is carried in the envelopes. The preliminary results are s
 urprising have implications for the simulation and operation of hearing de
 vices.
LOCATION: CBL seminar room in the Department of Engineering
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