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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Proceedings ArticleDOI
Generating virtual microphone signals in noisy environments
TL;DR: This paper presents a method to generate a VM signal in the presence of noise using a parametric multichannel Wiener filter, where a trade-off parameter is applied in order to achieve a constant residual noise level in the generated VM signal, irrespective of the VM position.
Journal ArticleDOI
Prestress effects on the eigenfrequencies of the soundboards: Experimental results on a simplified string instrument
TL;DR: Vibrational eigenmodes are identified using nearfield acoustical holography (NAH) measurement and the results show the effectiveness of NAH for this purpose and a very good qualitative concordance with previous numerical and analytical calculus.
Proceedings ArticleDOI
Directional Interference Suppression Using a Spatial Relative Transfer Function Feature
Sebastian Braun,Ivan Tashev +1 more
TL;DR: It is shown that the proposed spatial suppressor is able to suppress noise and directional interfering speakers, which substantially improves the performance of speech recognizer, and reduces undesired recognition of interfering talkers.
Journal ArticleDOI
Modelo de identificación de fuentes sonoras. Aplicación al ruido del motor de un automóvil
TL;DR: In this paper, the authors developed simple source models for engine noise using a mock-up panel of loudspeakers set up following the substituted monopole technique, and evaluated the real-life experience of listening to this sound is assessed by the implementation of DIN 45631/ISO 532B Loudness representation and the evaluation of the related sound quality, together with the annoyance level, is determined in a quick and economical manner, in contrast to other existing techniques.
Journal ArticleDOI
Noise source identification in a 2D cavity based on inverse finite element method
TL;DR: This paper presents an approach to reconstruct sound pressure and particle velocity on the boundary, based on an inverse finite element method (IFEM), which requires sound pressure measurements in the interior first and is applied in a two-dimensional laboratory experiment.
Related Papers (5)
A highly scalable spherical microphone array based on an orthonormal decomposition of the soundfield
Jens Meyer,Gary W. Elko +1 more