> Hello, all
[ ... ]
> The W component equals to the mean of signals from four mics. Then I
> decoded them to get the
> feeding signal for four loudspeakers, and used HRTFs to get the left and
> right signal for headphone.
>
>
> 1.       Furthermore, the experiment is made that a person was walking
> around the array and say
> something in an office. After processed by the method above, I find there
> is a problem that
> the speech sounds like a person talking and moving around my head but very
> near to my ears [ ... ]

Do you get the same problem if you playback through four loudspeakers, or
is it only after HRTF manipulation ?

(I cannot see how it would cause this, but: Have you controlled to see if
W is at the correct level compared with X and Y (depends a lot on the
polar pattern of your mic's). Probably would need to analyse some
recordings of 'point' sources to check that.)

Michael


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