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
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Measurement of thin films using very long acoustic wavelengths
TL;DR: In this article, a procedure for measuring material thickness by means of necessarily long acoustic wavelengths is examined, which utilizes a temporal phase lag caused by the impulse time of wave momentum transferred through a thin layer that is much denser than its surrounding medium.
Proceedings ArticleDOI
Richness of random multipath fields in waveguides
Yeye Lv,Hangfang Zhao +1 more
TL;DR: The Karhunen-Loeve (KL) expansion is used to quantify the richness of random multipath fields by providing a set of eigenvalues, and the richness is shown by plotting the distribution of eigens obtained from KL the expansion.
Journal ArticleDOI
Dominant modes of submerged thin cylindrical shells
TL;DR: In this paper, the concept of modified bending stiffness is extended to estimate the dominant mode of a submerged thin cylindrical shell, and the validity of the theory is confirmed by a good agreement between theoretical and experimental results on flexural wave velocity.
Proceedings ArticleDOI
Robust Stochastic Maximum Likelihood Algorithm for DOA Estimation of Acoustic Sources in the Spherical Harmonic Domain
TL;DR: A novel iterative stochastic maximum likelihood algorithm for DOA estimation of multiple sound sources in the presence of spatially nonuniform noise in the SH domain is proposed and results indicate that the proposed algorithm improves the robustness of estimation, i.e, the root mean square error.
Related Papers (5)
A highly scalable spherical microphone array based on an orthonormal decomposition of the soundfield
Jens Meyer,Gary W. Elko +1 more