Results 291 to 300 of about 1,827,815 (335)
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Absorption of acoustic waves by sunspots
Solar Physics, 1992Observations of the scattering of acoustic waves by sunspots show a substantial deficit in scattered power relative to incident power. A number of calculations have attempted to model this process in terms of absorption at the magnetohydrodynamic Alfven resonance.
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Acoustic absorption in aqueous potassium phosphate
Journal of Solution Chemistry, 1980Measurements of acoustic absorption and velocity as a function of frequency and concentration in KH2PO4−K2HPO4 buffers at 4°C and pH 5-7 are reported. The dependence of the observed acoustic relaxation parameters on concentration is consistent with that to be expected from perturbation of a monomer-dimer equilibrium with an equilibrium constant [for ...
L. Madsen +3 more
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Laminate structure with improved acoustical absorption
The Journal of the Acoustical Society of America, 1986A laminate structure with improved acoustical absorption is provided which has a first and a third layer of foamed thermoplastic material and a second layer, intermediate the first and third layers, which is a material having acoustical properties different from the properties of the material of the first and third layers. A portion of the surface area
James S. Holtrop, Richard P. Maurer
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Mechanism of Acoustic Absorption in Tissue
The Journal of the Acoustical Society of America, 1952A viscous mechanism for the absorption of ultrasonic energy in tissue is considered. It is shown that the viscous forces acting between a suitably chosen distribution of suspended particles or structure elements and a suspending liquid can account for the experimentally observed linear relations between acoustic absorption coefficient and ultrasonic ...
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Acoustic Absorption in Sand and Soil
The Journal of the Acoustical Society of America, 1948The acoustic absorption properties of sand and soil with varying amounts of water, ranging from dry to saturated, have been investigated. In most of the work the frequency range was 10–30 kc, although data were obtained at as high as 150 kc. Two methods were used.
W. L. Nyborg, I. Rudnick
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Nuclear acoustic resonance absorption and dispersion
Physics Letters A, 1977Abstract A generalized form of the “Kubo susceptibility” is presented correlating NAR absorption and NAR dispersion with the sound induced perturbation Hamiltonian h ( t ).To illustrate the advantage of NAR susceptibility, we give the first quantum theoretical treatment of dipole NAR in metals whose results are in agreement with experiment.
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Absorption Characteristics of Nonlinear Acoustic Resonators
The Journal of the Acoustical Society of America, 1968In the present note, which is a supplement to a previous paper [U. Ingard and H. Ising, J. Acoust. Soc. Amer. 42, 6–17 (1967)] on the nonlinear impedance of an orifice, the absorption characteristics of a nonlinear resonator absorber have been computed as a function of frequency for different values of design parameters and incident sound-pressure ...
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Electromagnetically induced acoustic transparency and absorption
Journal of Experimental and Theoretical Physics Letters, 2002The possibility of controlling the passage (from transmission to absorption) of a hypersound through a low-temperature paramagnet using the resonance electromagnetic pumping of lower frequency is substantiated. The effect has a quantum nature and is analogous to (though somewhat different from) the optical phenomenon of electromagnetically induced ...
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
exaly