Results 11 to 20 of about 33,703 (304)
Analysis of Acoustic Attenuation Spectra of Lipon Glasses
Communications, 2010 The acoustic attenuation spectra which reflect the basic features of the relaxation and transport processes of the mobile ions of investigated phosphate and oxynitride phosphate glasses are analyzed.
Peter Hockicko +3 more
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Anisotropic spectra of acoustic type turbulence [PDF]
Physics of Plasmas, 2008 The problem of spectra for acoustic type of turbulence generated by shocks being randomly distributed in space is considered. It is shown that for turbulence with a weak anisotropy, such spectra have the same dependence in k-space as the Kadomtsev–Petviashvili spectrum: E(k)∼k−2.
Kuznetsov, E., Krasnoselskikh, Vladimir
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Techniques for classifying acoustic resonant spectra [PDF]
Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers, 2002 A second-generation nondestructive evaluation (NDE) system that discriminates between different types of chemical munitions is under development. The NDE system extracts features from the acoustic spectra of known munitions, builds templates from these features, and performs classification by comparing features extracted from an unknown munition to a ...
Roberts, R. S. +3 more
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Analysis of Acoustic Spectra Reflecting Ion Transport Processes in Glassy Electrolytes
Advances in Electrical and Electronic Engineering, 2004 The investigation of acoustic spectra in ion conductive glasses wiht different composition can reflect the basic features of the relaxation and transport processes of the mobile ions.
Peter Hockicko +4 more
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Fitting Jet Noise Similarity Spectra to Volcano Infrasound Data
Earth and Space Science, 2021 Infrasound (low‐frequency acoustic waves) has proven useful to detect and characterize subaerial volcanic activity, but understanding the infrasonic source during sustained eruptions is still an area of active research.
J. E. Gestrich +4 more
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Anisotropic spectra of acoustic turbulence
Physical Review E, 2000 We found universal anizopropic spectra of acoustic turbulence with the linear dispersion law \bbox{$ω(k) =ck$} within the framework of generalized kinetic equation which takes into account the finite time of three-wave interactions. This anisotropic spectra can assume both scale-invariant and non scale-invariant form. The implications for the evolution
L'vov, V. S, L'vov, Yu. V., Pomyalov, A.
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Spectral Acoustic Fingerprints of Sand and Sandstone Sea Bottoms
Journal of Marine Science and Engineering, 2022 Modern studies which dealt with the frequency domain analysis showed that a frequency-domain approach has an essential advantage and mentioned an inner qualitative relationship between the subsurface structure and its frequency spectra.
Uri Kushnir, Vladimir Frid
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A Spectra-Based Equalization-Generation Combined Framework for Throat Microphone Speech Enhancement
IEEE Access, 2018 Non-acoustic sensors are widely used in speech signal processing tasks, and their immunity to the background acoustic noise shows great benefits to traditional speech enhancement.
Changyan Zheng +4 more
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Experiments on wave turbulence : the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity. [PDF]
, 2010 We report our experiments on the formation of second sound acoustic turbulence in superfluid 4He. The initial growth in spectral amplitude follows power laws that steepen rapidly with increasing harmonic number n, corresponding to a propagating front in ...
P V E McClintock +9 more
core +1 more source
VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]
, 2002 The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E. +5 more
core +1 more source