Open AccessBook
Fourier Acoustics: Sound Radiation and Nearfield Acoustical Holography
Earl G. Williams,J. Adin Mann +1 more
TLDR
The Inverse Problem: Cylindrical NAH. as discussed by the authors The Inverse problem: Planar NAH and the Inverse NP-hardness of planar plane waves.Abstract:
Preface. Fourier Transforms & Special Functions. Plane Waves. The Inverse Problem: Planar NAH. Cylindrical Waves. The Inverse Problem: Cylindrical NAH. Spherical Waves. Spherical NAH. Green Functions & the Helmholtz Integral. Index.read more
Citations
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Journal ArticleDOI
Design of a Planar First-Order Loudspeaker Array for Global Active Noise Control
TL;DR: This paper uses the closely-located monopole pairs, instead of the ideal general first-order loudspeakers, to design an alternative planar array for practical implementation and uses several simulation examples to validate the performance of the two proposed planar loudspeaker arrays.
Journal ArticleDOI
Pre-migration: A General Extension for Photoacoustic Imaging Reconstruction
TL;DR: An algorithm extension called pre-migration is proposed to first convert the reconstruction problems that apply to homogeneous media that can be integrated into almost all classical reconstruction algorithms and successfully solves reconstruction problems when imaging through heterogeneous media.
Journal ArticleDOI
High sound screening in low impedance slit arrays
TL;DR: In this paper, the key role of the acoustical impedance ratio between the solid and the host fluid in the transmission properties of slit arrays is discussed, and numerical calculations predict huge sound screening effects up to 60dB for low impedance ratio values.
Proceedings ArticleDOI
Time Domain Spherical Harmonic Analysis for Adaptive Noise Cancellation over a Spatial Region
TL;DR: A time-domain spherical harmonic based signal decomposition method is developed and used to develop two time-space domain feed-forward adaptive filters for spatial ANC and it is shown that the proposed methods can achieve higher noise reduction performance over the control region with microphones located on the surface of the region compared to the conventional time- domain adaptive filter.
Proceedings ArticleDOI
Eigenbeam-based acoustic source tracking in noisy reverberant environments
TL;DR: In this article, an adaptive acoustic source tracking algorithm based on eigenbeams which perform spatial decomposition of the sound field, works in two dimensions for tracking of azimuth and elevation, has low computational complexity, and is robust to room reverberation.
Related Papers (5)
A highly scalable spherical microphone array based on an orthonormal decomposition of the soundfield
Jens Meyer,Gary W. Elko +1 more