high-frequency sound propagation
The Effects of Surface Gravity Waves on High-Frequency Acoustic Propagation in Shallow Water
... Fig. 7 shows an example of model results for a run with random surface realization generated by 7-m/s wind and Delaware Bay average fetch of 10 nautical miles. The sound speed was assumed uniform in depth. Fig. ...
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A High Performance Computer Model for Sound Propagation in Human Thorax
... the sound propagation simulation reproduces certain characteristics observed in breath ...the sound propagates in the thorax can generate higher frequency sounds on the chest ...the ...
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Investigation of sound propagation in a duct with a mean temperature gradient
... A sound source mounted at one end of the impedance tube is used to send sound ...When sound source is turned on, the air particles next to it in the impedance tube will be vibrating forward and ...
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The Effect of Wood Condition on Sound Wave Propagation
... and High (H)), Signal Generator (SG) input signal fre- quency (1, 5, 10, 15, 20, 25, 50 and 100 kHz), signal travelling distance (0 for in- put signal (control), 200, 400, 600, 800 and 1000 mm) and wood condition ...
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Numerical Study on Nonlinear Sound Propagation for Parametric Array
... difference frequency sound of low frequency through the interaction of high-frequency sound waves of fundamental ...low-frequency sound generated from the ...
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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 ...
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Frequency Analysis of Sound Propagation Based on Direct Simulation
... underwater sound propagation are developed: The one is analytic computing on frequency ...the sound propagation problem has a periodic source term, and the simulation gives a ...
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Mechanism of sound propagation in seawater
... require high bit 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 ...
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Influence of sorption on sound propagation in granular activated carbon
... low-frequency sound absorption coefficient than sample ...the high frequency sound absorption ...the sound absorption coefficient of an array of non-porous particles is ...
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Sound Wave Propagation in Viscous Liquid-Filled Non-Rigid Carbon Nanotube with Finite Length
... the high frequency vibrational analysis needed for the liquid-filled ...wave propagation in elastic tubes containing viscous fluid is not a new issue [42, 43], there have been only a few ...
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Investigating Granular Structure with Spatial and Temporal Methods.
... granular sound propagation and vibrational modes are influenced by disorder in particle positions and contact ...on sound amplitude and speed, how to characterize the bulk pressure via the density of ...
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Multidimensional sound propagation in 3D high-order topological sonic insulator
... a high-order sonic TI, it needs to create sonic crystals with trivial and non-trivial topological properties, ...topological propagation modes over a wide frequency ...on high- symmetry point ...
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Sound propagation and force chains in granular materials
... wave propagation (including diffraction, scattering, and dispersion) Abstract – Granular materials are inherently heterogeneous, leading to challenges in formulating accurate models of sound ...methods, ...
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Sound Propagation and Reconstruction Algorithm Based on Geometry
... In this paper, we considered two different methods of tracing sounds. The forward tracing has the limitation of either low simulation quality or long computational time. These limitations are caused by incomplete ...
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Different High-Frequency Ventilator Strategies: Effect on the Propagation of Tracheobronchial Histopathologic Changes
... Tracheobronchial histopathologic alterations may occur in sick newborn infants following any type of mechanical ventilation.4 Previously, we described such findings in premature baboons [r] ...
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Low frequency sound propagation in activated carbon
... 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 frequencies ...
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Multi Hop HF Electromagnetic Wave Reflection Model Based on Improved Genetic Algorithm
... multi-hop propagation of HF radio waves on the ocean surface, this paper fully considers the whole process of signal loss caused by multi- hop propagation of high-frequency radio waves in the ...
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Sound propagation through bone tissue
... Vibrating the bone has generated structural borne acoustic waves travelling through the bone and along the surface of the bone. The responses have been detected at the top of human tibia just under the knee cap. The ...
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To the Question of Sound Waves Propagation in Liquid
... a sound wave, the average velocity of the liquid element is equal to ...a sound wave density and pressure vary on the value of ρ′ and p ′, which is much less than the equili- brium values of ρ 0 and p 0 ...
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Exposition of working and natural environment to noise during timber transport by helicopter MIL MI 8 in Carpathian region of Slovakia
... Abstract: This paper includes the results of noise measurements during timber transport by helicopter MI-8 in The High Tatras conditions in 2005. Using this highly efficient timber skidding technology with ...
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