AW: [music-dsp] Stereo sample panning.. I'm wondering..

[Holger Strauss]

Oops, you must be in trouble if your head is really about 1/3 meter wide.
:-)
Mine is just 1/6 meter wide, resulting in about 20 samples delay for 44.1
kHz sample rate.
In the well-known and very recommendable book "Spatial Hearing" by Jens
Blauert, there is a curve showing psychoacoustic listening test results for
the lateralization (displacement from the center) of the perceived auditory
event depending on the interaural delay for impulses and signals with
impulse content. It shows a linear relationship between the delay and the
displacement up to approximately 630 us delay. At 630 us the auditory event
is already very close to the ear, finally reaching it for a delay of 1 ms.

Holger


> -----Ursprüngliche Nachricht-----
> Von:	Joshua Scholar [SMTP:joshscholar at yahoo.com]
> Gesendet am:	Mittwoch, 23. Februar 2005 08:38
> An:	music-dsp
> Betreff:	Re: [music-dsp] Stereo sample panning.. I'm wondering..
> 
> Eeek you're right about the delay.
> 
> I miscalculated a long time ago...  But I see now that the speed of sound
> is
> about 340 m/s and my head is about a foot wide or 1/3 of a meter.  That
> means a delay of 43 samples is 90 degrees...
> 
> Yet I doing listening tests (again) I see that it take far fewer samples
> difference to create the impression that a sound is entirely  on one side
> -
> or even exagguratedly on one side.  One gets the impression that one of
> the
> head phone elements is completely dead even though it's actually just as
> loud as the other.
> 
> What accounts for this I wonder? I'm I overly sensitive to delays? Did we
> make another mistake?
> 
> Joshua Scholar
>