Sound Field Recording by Measuring Gradients

Gradient based microphone arrays, the horizontal sound field's plane wave decomposition, and the corresponding circular harmonics decomposition are reviewed. Further, a general relation between directivity patterns of the horizontal sound field gradients and the circular harmonics of any order is derived. Based on this relation, a number of example differential microphone arrays are analyzed, including arrays capable of approximating the sound pressure gradients necessary for obtaining the circular harmonics up to order three.


Published in:
Proceedings of the 128th AES Convention
Presented at:
AES 128th Convention, London, May 22-25, 2010
Year:
2010
Keywords:
Laboratories:




 Record created 2010-05-26, last modified 2018-01-28

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