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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Dissertation
The Effect of Time-Varying Boundary Conditions on the Generation of Sum and Difference Frequency Tones in a Coaxial Loudspeaker
TL;DR: In this paper, a coaxial loudspeaker in which the woofer and tweeter oscillate at angular frequencies ω1 and ω2 respectively, is known to produce sum and difference frequency ω± = ω 1 ± ω 2.
Journal ArticleDOI
Sidelobe suppression by desired directivity pattern optimization for a small circular loudspeaker array
Koya Sato,Yoichi Haneda +1 more
TL;DR: This paper proposed a filter design method using a window function shape as the desired directivity pattern to reduce the sidelobe levels using a real six-element circular loudspeaker array and verified that it is more effective than the conventional method for sidelobe suppression.
Journal ArticleDOI
Impact of propagating and standing waves on cavitation appearance.
TL;DR: Investigation of the effect that the relation between standing and propagating waves in a focused field has on acoustic bubble cloud formation shows that configurations with a larger propagating component induce bubble clouds at lower pressures than configurations with an larger standing component.
Journal ArticleDOI
Modeling the measurement of ultrasonic beams transmitted through a penetrable acoustic cone
TL;DR: A simplified model is developed which describes the deflection caused by refraction through the cone using ray theory, then uses Huygens' summation to calculate the transducer response from this deflection, and shows that transmission occurs in two different regimes, depending on the parameters of the particular problem.
Proceedings ArticleDOI
Extrapolation of Spatial Transfer Functions for Primary Reflections with Equivalent Sources
TL;DR: In this paper, the authors proposed a method of estimating the sound field using a small number of microphones to make it easier to measure the spatial transfer function (STF) at multiple points.
Related Papers (5)
A highly scalable spherical microphone array based on an orthonormal decomposition of the soundfield
Jens Meyer,Gary W. Elko +1 more