The second-order components of a spherical harmonics expansion of the sound pressure field can be obtained by means of velocity transducers based on hot-wire anemometry. Such velocity transducers are small compared to acoustic wavelengths and can be mounted on a tiny rigid bar only a few millimeters wide, thereby reducing the effects of wave diffraction and acoustic shadows. Numeric simulations and experimental tests using two Microflown pressure-velocity transducers validate the proposed approach.

Authors: Cengarle, Giulio; Mateos, Toni; Bonsi, Davide
Affiliations: Fundació Barcelona Media, Barcelona, Spain; Fondazione Scuola di San Giorgio, Musical and Architectural Acoustics Laboratory, Venezia, Italy(See document for exact affiliation information.)
JAES Volume 59 Issue 9 pp. 656-668; September 2011
Publication Date: October 10, 2011

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