Design and Evaluation of a Spherical Segment Array with Double Cone

Pomberger, Hannes; Pausch, Florian

doi:10.3813/aaa.918771

Cited by 5 publications

(1 citation statement)

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“…Pomberger et al described the diffraction caused by a rigid sphere in a propagation space with rigid boundary conditions at two polar angles. [28,29]. A special case of practical importance receiving so far only limited attention is a model for loudspeaker arrays radiating into the half-space.…”

Section: Introductionmentioning

confidence: 99%

An analytical model for wedge-shaped acoustic arrays

Hoffmann

Williams

Fazi

et al. 2019

Journal of Sound and Vibration

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This work presents the derivation of a 3D sound field model for the pressure field radiated from loudspeaker arrays in acoustic wedge spaces. These wedge arrays are described by their normal velocity profile at a given boundary. Using this model, a suitable beamforming technique with two different beam patterns is derived based on a mode-matching approach. The model is then used to study the beamforming performance as a function of frequency and distance from the array by analysing the Arc Radial Functions introduced in this work. The theory is tested on the basis of simulation results for different wedges and validated through holographic measurements made with a hemi-cylindrical array. It is found that for a large distance, a far-field approximation of the model can be used to drive the array, whereas for a short distance, the general model must be applied to yield accurate results.

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Section: Introductionmentioning

confidence: 99%