Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Infrasonic"”.
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ImponderableSound: Using infrasonic frequencies within sonic art installations
… for the installation environment that emits infrasonic frequencies with the intention of affecting the human body both internally and externally. Imponderable Sound looks at sensation and the experience of sensation through haptic perception. This thesis considers both the artistic …
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Optimization Of Wind Fence Enclosures For Infrasonic Wind Noise Reduction
… and tested to optimize wind noise reduction at infrasonic frequencies between 0.01-10 Hz in order to develop a technology that is simple, cost effective, and improves upon the limitations of pipe and porous hose arrays. The effects of varying the fence's porosity, modifying its top condition and …
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Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion
A model is developed for the prediction of the seismo-acoustic noise spectrum in the microseism peak region (0.1 to 0.7 Hz). The model uses a theory developed by Cato [J. Acoust. Soc. Am., 89 , 1096-1112 (1991)] for an infinite depth ocean in which the surface orbital motion caused by gravity waves …
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Interaction Of The Cyclonic Winds With The Infrasonic Signal Generated By A Large Maritime Storm
… waves of like periods is known to produce an infrasonic signal termed a microbarom. It has been suggested that microbaroms associated with large maritime storms are generated far from the storm center at a location in which the storm swell and background swell have equal period and are …
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The consequences of gas slug ascent in a stratified magma on Strombolian eruption dynamics
… signals. The similarity between laboratory infrasonic waveforms, whose amplitudes are strongly dependant on the flow configuration in which the slugs burst, and measured infrasonic signals from Stromboli suggests that the slug burst through a plug represents a viable first-order mechanism …
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Sonic, infrasonic, and ultrasonic frequencies : the utilisation of waveforms as weapons, apparatus for psychological manipulation, and as instruments of physiological influence by industrial, entertainment, and military organisations
… which the past and current utilisation of sonic, infrasonic, and ultrasonic frequencies as weapons, apparatus for psychological manipulation, and instruments of physiological influence, by industrial, civilian, entertainment, and military organisations, predict future techniques of …
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Effects of atmospheric profiles on local infrasound propagation
… up to 20 km altitude and their effect on an infrasonic signal emanating from an arbitrary point source. A wide-angle, finite-element infrasound propagation model that correctly handles discontinuities in wavenumber is used for calculating transmission loss. A large number of simulations were …
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Infrasound Propagation in Terrestrial Planetary Atmospheres
<p>Acoustic waves in the infrasonic frequency range, that is below 10 Hertz, have been observed to propagate to high altitudes in Earth's atmosphere. These waves have many sources, both natural and artificial, such as seismic events, convective storm systems, and nuclear explosions. Here, we seek …
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Less-Than-Lethal Self Defense Device with an Acoustic Element
… and how to harness the power of ultrasonic and infrasonic sound waves to subdue to target; however, I concluded that using resonant frequencies to deter a human being is too dangerous, expensive, and can have negative effects for the user of the device if used incorrectly. After extensive …
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Segnali infrasonici e dinamica del magma al Mt. Etna: analisi acustica e multiparametrica per lo studio del sistema di alimentazione superficiale
… in particolare sul ruolo dei segnali infrasonici come strumento di interpretazione delle dinamiche interne e superficiali del vulcano. Infatti, l’infrasuono, grazie alla sua sensibilità alle variazioni della geometria dei condotti e alla posizione della superficie libera del magma, …
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Sensing animal group behavior and bio-clutter in the ocean over continental shelf scales
… that large-scale tsunamis may produce deep-infrasonic signals that travel thousands of kilometers in the atmosphere. By developing an analytical model to describe air-borne infrasound generation by tsunamis and applying it to the 2004 Indian Ocean Tsunami, it is shown that the mass flow of …