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A Second-Order Ambisonics Device Using Velocity Transducers

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.

 

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Permalink: https://aes2.org/publications/elibrary-page/?id=15981


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