Re: [Ika-auditory] [AUDITORY] ITDs

[Joachim Thiemann <joachim.thiemann@xxxxxxxxx>]

On Wed, Sep 23, 2009 at 16:47, Nilesh Madhu
<Nilesh.Madhu@xxxxxxxxxxxxxxxxxx> wrote:
> [...] However, this can be avoided by computing
> the ITD on the basis of the envelopes of a suitably band-passed region in
> these frequencies. This could also be the reason for the increasing bandwidth
> of the auditory filters, with increasing center frequency.

Hello Nilesh,
    I think another thing to consider is that since the BW of the
auditory filters increases with center frequencies, the envelope will
also increase in bandwidth.  Also, even minor ILDs of sounds other
than the test tone will affect the envelope more strongly.

   What I am trying to convey (probably badly) is that I think for
higher frequency bands, in _natural_ circumstances (that is, not
headphone stimuli), the interaural envelopes are probably not
correlated enough (due to reverb, noise, etc) for the brain to detect
ITD cues, or at least most people will never learn to use these cues
without training.

Joe.
-- 
Joachim Thiemann :: http://www.tsp.ece.mcgill.ca/~jthiem