Results 141 to 150 of about 9,260,103 (204)

Conical near-field acoustic holography based on cylindrical wave function of variable radius and nonconformal plane measurement

Transactions of the Institute of Measurement and Control, 2023
In practical acoustical measurement for large cones, maintaining coaxial and conformal between the holographic surface and reconstructed surface is usually tedious.
Wei Cheng, Chao Song, Shengming Han, Kai Ou, Xuefeng Chen, Lin Gao, Zelin Nie, Peng Zhang, Jinglei Ni   +8 more
semanticscholar   +1 more source

A combined sound field reconstruction method for non-cylindrical rotative surfaces based on statistically optimal cylindrical near-field acoustic holography and multipoint Helmholtz equation least square

Journal of Vibration and Control, 2022
For the sound field reconstruction of non-cylindrical rotative surfaces, current near-field acoustic holography (NAH) methods have relatively poor applicability and low accuracy.
Wei Cheng, Peng Zhang, Chao Song, Xuefeng Chen, Kai Ou, Shengming Han, Jinglei Ni, Zelin Nie, Yilong Liu   +8 more
semanticscholar   +1 more source

Resolution enhanced statistically optimal cylindrical near-field acoustic holography based on equivalent source method

Measurement science and technology, 2022
For the sound field reconstruction of large cylindrical surfaces, statistically optimal cylindrical near-field acoustic holography (SOCNAH) has high reconstruction accuracy but low resolution. To solve this problem, resolution enhanced SOCNAH (RE-SOCNAH)
Wei Cheng, Peng Zhang, Chao Song, Xuefeng Chen, Kai Ou, Muhammad Mubashir Ahsan   +5 more
semanticscholar   +1 more source

Multisource statistically optimized near-field acoustical holography

The Journal of the Acoustical Society of America, 2015
This paper presents a reduced-order approach to near-field acoustical holography (NAH) that allows the user to account for sound fields generated by multiple spatially separated sources. In this method, an equivalent wave model (EWM) of a given field is formulated to include combinations of planar, cylindrical, spherical, or other elementary wave ...
Alan T, Wall, Kent L, Gee, Tracianne B, Neilsen   +2 more
openaire   +2 more sources

Planar near-field acoustical holography in a moving medium

The Journal of the Acoustical Society of America, 2002
Near-field acoustical holography (NAH) is a well-established method to study acoustic radiation near a stationary sound source in a homogeneous, stationary medium. However, the current theory of NAH is not applicable to moving sound sources, such as automobiles and trains.
Richard J, Ruhala, David C, Swanson
openaire   +2 more sources

Surface decomposition method for near-field acoustic holography

The Journal of the Acoustical Society of America, 2012
Near-field acoustic holography reconstruction of the acoustic field at the surface of an arbitrarily shaped radiating structure from pressure measurements at a nearby conformal surface is obtained from the solution of a boundary integral equation. This integral equation is discretized using the equivalent source method and transformed into a matrix ...
Nicolas P, Valdivia, Earl G, Williams, Peter C, Herdic, Brian, Houston   +3 more
openaire   +2 more sources

Measurement of confined acoustic sources using near-field acoustic holography

The Journal of the Acoustical Society of America, 2009
Due to excessive reverberation or to the presence of secondary noise sources, characterization of sound sources in enclosed space is rather difficult to perform. In this paper a process layer is used to recover the pressure field that the studied source would have radiated in free space.
Langrenne, Christophe, Melon, Manuel, Garcia, Alexandre   +2 more
openaire   +3 more sources

Equivalent source method based Near-field acoustic holography using machine learning

INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 2023
The equivalent source method has been one of the most commonly used methods for sound source localization. It involves equivalent sources spread over the source plane (or region).
S. K. Chaitanya, S. Sriraman, Srinath Srinivasan, S. K.   +3 more
semanticscholar   +1 more source

Hybrid near-field acoustic holography

The Journal of the Acoustical Society of America, 2003
Hybrid near-field acoustical holography (NAH) is developed for reconstructing acoustic radiation from an arbitrary object in a cost-effective manner. This hybrid NAH is derived from a modified Helmholtz equation least squares (HELS) formula that expands the acoustic pressure in terms of outgoing and incoming waves.
openaire   +2 more sources

Physics-Informed Neural Network-Driven Sparse Field Discretization Method for Near-Field Acoustic Holography

IEEE Transactions on Audio, Speech, and Language Processing
We propose the Physics-Informed Neural Network-driven Sparse Field Discretization method (PINN-SFD), a novel self-supervised, physics-informed deep learning approach for addressing the Near-Field Acoustic Holography (NAH) problem.
Xinmeng Luan, Mirco Pezzoli, F. Antonacci, A. Sarti   +3 more
semanticscholar   +1 more source