low-frequency sound propagation
Low frequency sound propagation in activated carbon
... affects low frequency sound waves, with pressures typical of audible sound, interacting with granular activated ...highest frequency measured (500 Hz), but was most significant at lower ...
11
Atmospheric controls on elephant communication
... surface, sound levels will be doubled as a result of ...reduces sound levels at long distances. Impedance is frequency-dependent: surfaces are more reflective of lower frequencies, and ...
13
RETRACTED: The Effects of Internal Waves on Propagation Behavior of Sound in the Sea
... in sound propagation associated with vertical displacement, we find that the latter effect is much smaller (except in very deep water), then they can be ...be- low inertial frequencies, so that ...
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The Effect of Wood Condition on Sound Wave Propagation
... the sound waves travelling through different types of wood under various ...signal frequency were also included in this ...and frequency of travelling signals and com- pared them with the original ...
15
Morales_unc_0153D_17530.pdf
... acoustic propagation simulation: geometric and wave- ...model low-frequency effects such as diffraction or ...techniques sound noticeably different from diffraction simulated using wave-based ...
141
Numerical Study on Nonlinear Sound Propagation for Parametric Array
... single frequency sound ...single frequency does not change with the time steps, the pressure wave of the parametric sound varies with the time steps and the result indicates the generation of ...
6
Effect of heat treatment temperature and time on sound absorption coefficient of Larix kaempferi wood
... The sound absorption coefficients of porous materials, such as wood, are proportional to the porosity and roughness of the internal pore ...the propagation of stress waves in a porous elastic solid [7, ...
5
Characterization and Impact of Low Frequency Wind Turbine Noise Emissions
... the low frequency portion of the noise ...quite low, so as long as they are within regulatory limits, no further consideration is often given to a potential noise ...if low frequency ...
159
Mechanism of sound propagation in seawater
... rates, low error probability and long distance capabilities which are extremely difficult to achieve, given the ocean is a highly complex medium (Baggeroer, ...and frequency- dependant fluctuations in the ...
5
Frequency Analysis of Sound Propagation Based on Direct Simulation
... the sound propagation problem plays an interdisciplinary and practical significant ...underwater sound propagation are field survey and physical ...costs, low data rates and ...
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Sound propagation through a rarefied gas in rectangular channels
... at low oscillation frequencies, at relatively high oscilla- tion frequencies, inertial force leads to the interference of sound waves along the oscillating direction of the plate, so that the magnitude of ...
10
Sound Propagation and Reconstruction Algorithm Based on Geometry
... of sound reflections between sources and ...reflection sound propagation as well as a direct ...whose sound pressure levels were not ...the sound pressure level ...zero sound ...
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From source to brain: Modelling sound propagation and localisation in rooms
... separate frequency chan- nels, then multiple delay lines exist, each corresponding to data in a different critical ...a frequency band of interest (Joris et ...
241
15 Sound.pdf
... Junhao stands in between two cliffs as shown in the diagram and fires his pistol. He heard two echoes. He heard the first echo after 2 s and the second echo after 5 s. Assuming that the speed of sound in air is ...
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Turbulence of Second Sound Waves in Superfluid 4He: Effect of Low Frequency Resonant Perturbations
... second sound waves from the nearly linear regime at low driving amplitudes, to a nonlinear regime and, further, to developed turbulence at high driving ...
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Sound propagation and force chains in granular materials
... – Sound propagation in granular mate- rials differs from propagation in ordinary elastic materials in that there is a poor separation of length scales, particu- larly manifest in the branching ...
6
Influence of network topology on sound propagation in granular materials
... which sound travels ...of sound propagation, suggesting that the force-chain structure of the granular material is an important component in sound ...how sound travels through a ...
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Zero Sound Propagation in Femto Scale Quantum Liquids
... Charge equilibrium in heavy-ion reactions means the states with the proton-neutron ratio corresponding to the average of the colliding ions, and charge equilibration is the process leading towards charge equilibrium. The ...
7
New Method in Calculating the Trajectory of Sound Waves at Stratified Ocean
... of sound waves (rays) in layered stratified speed of sound in ocean without ...A sound wave in the fluid is considered as a ...All sound energy is converted into the reflected beam, and total ...
9
Measuring elastic constants using non contact ultrasonic techniques
... spacing between the peaks and the path travelled (twice the sample thickness); in the example in figure 4, the time between echoes calculated from the frequency spacing for room temperature measurements is 2.424 ...
5