title: Beamforming with a circular array of microphones mounted on a rigid sphere (L).
abstract: Beamforming with uniform circular microphone arrays can be used for localizing sound sources over 360°. Typically, the array microphones are suspended in free space or they are mounted on a solid cylinder. However, the cylinder is often considered to be infinitely long because the scattering problem has no exact solution for a finite cylinder. Alternatively one can use a solid sphere. This investigation compares the performance of a circular array mounded on a rigid sphere with that of such an array in free space and mounted on an infinite cylinder, using computer simulations. The examined techniques are delay-and-sum and circular harmonics beamforming, and the results are validated experimentally.
authors: Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark, Orsteds Plads 352, 2800 Kongens Lyngby, Denmark. etr@elektro. dtu.dk
authors: Elisabet
authors: E
authors: Tiana-Roig
authors: Finn
authors: F
authors: Jacobsen
authors: Efren
authors: E
authors: Fernandez-Grande
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000465:Algorithms; D003198:Computer Simulation; D004548:Elasticity; D004867:Equipment Design; D005583:Fourier Analysis; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure