Results 181 to 190 of about 329 (216)
Some of the next articles are maybe not open access.
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
openaire +1 more source
Acoustic absorption properties of materials
Construction and Building Materials, 1988Abstract The sound absorption characteristics of some 30 different but easily available sound absorbing materials have been studied previously. Presented here in brief are a selection of these materials, their description, methodology used and results obtained.
openaire +1 more source
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.
openaire +1 more source
Phononic glass: A robust acoustic-absorption material
The Journal of the Acoustical Society of America, 2012In order to achieve strong wide band acoustic absorption under high hydrostatic pressure, an interpenetrating network structure is introduced into the locally resonant phononic crystal to fabricate a type of phononic composite material called “phononic glass.” Underwater acoustic absorption coefficient measurements show that the material owns high ...
Heng, Jiang, Yuren, Wang
openaire +2 more sources
A Small Acoustical Tube for Measuring Absorption of Acoustical Materials in Auditoriums
The Journal of the Acoustical Society of America, 1946A small acoustical tube is described, which is suitable for measuring absorption coefficients of acoustical materials over a limited frequency range. This instrument is useful for checking the acoustical characteristics of materials after they have been applied to the walls of theaters, studio review rooms, and other auditoriums.
D. P. Loye, R. L. Morgan
openaire +1 more source
Acoustic absorption in amorphous silicate down to 1 K
Il Nuovo Cimento B Series 11, 1976The acoustic absorption in amorphous silica was measured between 1 K and 20 K and at frequencies between 15 and 65 MHz. It was shown that in the range (3÷5) K there exists an absorption peak whose position is temperature dependent, thus indicating a thermally activated relaxation process.
Ballaro' S. +4 more
openaire +2 more sources
Scattering and absorption by acoustic resonators
1950Thesis (Ph.D.) Massachusetts Institute of Technology. Dept. of Physics, 1950. ; Vita. ; Bibliography: leaves 115-119. ; by Karl Uno Ingard. ; Ph.D.
openaire +1 more source
Nonlinear Optical Absorption in Nanoscale Films Revealed through Ultrafast Acoustics
Nano Letters, 2022Keith Adam Nelson +2 more
exaly
Acoustical Impedance and Absorption Coefficients
American Journal of Physics, 1949Wallace A. Hilton, L. B. Ham
openaire +1 more source