Microphone arrays using tangential velocity sensors
P.G. Craven, C. Travis, M.J. Law
We introduce a new class of 3D microphone arrays that use symmetrical arrangements of tangential velocity sensors. Use of velocity sensors allows these arrays to recover spherical harmonics of a given degree with less low-frequency boost than when using pressure sensors only. As an example we present a symmetrical array of twelve velocity sensors that resolves the eight harmonics of degrees 1 and 2. A second-order spherical microphone can now be constructed by combining this array with one or more pressure sensors that provide the missing harmonic of degree 0.
