Results 211 to 220 of about 21,775 (260)
Some of the next articles are maybe not open access.
A Bayesian Scheme for Reconstructing Obstacles in Acoustic Waveguides
Journal of Scientific Computing, 2023zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yu Gao +3 more
openaire +2 more sources
Holographic Reconstruction With All-Acoustic Diffractive Network
IEEE Transactions on Computational ImagingDean Ta, Xin Liu, Tho Tran
exaly +2 more sources
Electronic reconstruction of acoustic holograms
IEEE Transactions on Audio and Electroacoustics, 1970A method is described for reconstructing acoustic hologram images using an electronic means which avoids multiple image formation. When the dimensions of the hologram are small compared to the dimensions of the viewing area, the incident waves are approximately plane rather than spherical.
openaire +3 more sources
Reconstruction of acoustic scenes in biosonar
The Journal of the Acoustical Society of America, 2018Biosonar mechanisms are highlighted by comparing acoustically reconstructed scenes derived from generalized methods with the performance of echolocating animals. Bioinspired computations replacing standard methods then offer a path towards understanding the animal’s solutions. Seemingly simple outdoor spaces present flying bats with complex scenes when
Chen Ming +3 more
openaire +1 more source
Reconstruction of transient acoustic radiation from a sphere
The Journal of the Acoustical Society of America, 2005Transient near-field acoustical holography (NAH) formulation is derived from the Helmholtz equation least squares (HELS) method to reconstruct acoustic radiation from a spherical surface subject to transient excitations in a free field. To facilitate derivations of temporal solutions, we make use of the Laplace transform and expansion in terms of the ...
Sean F, Wu, Huancai, Lu, Manjit S, Bajwa
openaire +2 more sources
Methods for reconstructing acoustic quantities based on acoustic pressure measurements
The Journal of the Acoustical Society of America, 2008This paper presents an overview of the acoustic imaging methods developed over the past three decades that enable one to reconstruct all acoustic quantities based on the acoustic pressure measurements taken around a target source at close distances. One such method that has received the most attention is known as near-field acoustical holography (NAH).
openaire +2 more sources
Acoustical image reconstruction devices
1977An improved use of ultrasound in the medical and non destructive testing areas is made nowadays. The very first ultrasonic apparatuses were performing in the A-scan mode, that is to say that a pulsed ultrasonic wavetrain was launched and the position in time of the echoes, which were reflected by the obstacles, were observed.
R. Torguet +3 more
openaire +1 more source
Reconstruction of the Acoustical Impedance Profile of a Multilayer Medium
Ultrasonic Imaging, 1992The recovery of the acoustical reflectivity function and impedance profile of a layered medium from bandlimited and noisy pulse-echo ultrasonic data is considered. The effects of the transducer and the noise are reduced using Wiener filtering. With further signal processing and a priori knowledge of the attenuation and the velocity profiles, the ...
I, Lifshitz, P C, Pedersen, P A, Lewin
openaire +2 more sources