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
Acoustic wave focusing by doubly curved origami-inspired arrays
Vivek Srinivas,Ryan L. Harne +1 more
TL;DR: In this article, the authors proposed to use spherically focused transducers to target acoustic energy delivery for medical treatment applicaiton, but these structures have limitations with respect to size and mobility.
Proceedings ArticleDOI
On bandwidth of broadband wavefields observed over spatial regions
TL;DR: This paper presents a characteristic expression to determine the effective bandwidth of broadband wavefields observed over a source-free finite spherical region and indicates that only a finite number of independent channels are available to carry information, each with an effective bandwidth.
Sound field reproduction using directional loudspeakers and the equivalent acoustic scattering problem
TL;DR: In this paper, it was shown that the signal strength of a desired sound field in the interior of a bounded region of the space, using an array of loudspeakers that exhibit a first order acoustic radiation pattern, can be determined by solving an equivalent scattering problem.
Book ChapterDOI
Ultrasonic transmission through periodically perforated plates
TL;DR: In this paper, sound is transmitted through individual subwavelength holes, in a perfectly rigid thin film approximately in proportion to their area, and a strong interplay between Wood anomaly minima and intrinsic plate modes (Lamb modes) results in fundamentally unique behavior of sound as compared to light.
Imaging of material inhomogeneities with flexural waves
TL;DR: In this paper, the authors focus on the improvement of techniques for the detection and visualisation of inhomogeneities in plate-like structures using flexural waves, one specific member of the family of guided waves.
Related Papers (5)
A highly scalable spherical microphone array based on an orthonormal decomposition of the soundfield
Jens Meyer,Gary W. Elko +1 more