Gianni,
Have you investigated the paradigm [1] involved using the VSIP (vector
sound-intensity probe)? It uses the tetrahedron and yields azimuth and
pitch to the source.
Ken Ekstrom
Research Associate
MIT Sea Grant
617 258 6302
[1] R. Hickling and W. Wei 1995. "Use of pitch-azimuth plots in
determining the direction of a noise source in water with a vector
sound-intensity probe" , J. Acoustic Soc. Am. 97(2), 856-866.
At 05:47 PM 4/18/2005 -0400, Gianni Pavan wrote:
I'm working on wideband multichannel recordings made with 4
hydrophones mounted on a 3D structure; something similar to a
tetrahedron, with 3 hydrophones mounted on an horizontal plane and the
fourth higher then the other 3. The spacing among the phones is roughly 2
meters.
I'm searching an algorithm to calculate the direction (bearing and
elevation) of an acoustic source given the time delays I measure among the
four hydrophones and their 3D coordinates.
Any hint will be much appreciated!
Gianni
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Gianni Pavan
Email
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universita' degli Studi di Pavia
Via Taramelli 24, 27100 PAVIA, ITALIA
Tel +39-0382-987874
Fax +39-02-700-32921
Web http://www.unipv.it/cibra
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