Results 31 to 40 of about 4,944 (223)
Annoyance of Audible Infrasound [PDF]
Journal of Low Frequency Noise, Vibration and Active Control, 1987 Contours of equal annoyance were determined for pure tones in the frequency range 4 – 31.5 Hz. The curves show a narrowing of the dynamic range of the ear at low frequencies. The same pattern is seen for equal loudness curves, and the results support the theory that the annoyance of infrasound is closely related to the loudness sensation.
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Volcano Infrasound: Progress and Future Directions [PDF]
, 2022 Over the past two decades (2000–2020), volcano infrasound (acoustic waves with frequencies less than 20 Hz propagating in the atmosphere) has evolved from an area of academic research to a useful monitoring tool. As a result, infrasound is routinely used
Anderson, Jacob F., Johnson, Jeffrey B.
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Acta Acustica, 2020 At many immission sites of infrasound (frequency f
Burke Elisa +2 more
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Atmosphere, 2021 Every day, about one thousand thunderstorms occur around the world, producing about 45 lightning flashes per second. One prominent infrasound station of the International Monitoring System infrasound network of the Comprehensive Nuclear-Test-Ban Treaty ...
Thomas Farges +5 more
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Mechanical Filter-Based Differential Pressure Fiber-Optic Fabry-Perot Infrasound Sensor
IEEE Photonics Journal, 2021 A differential pressure fiber optic infrasound sensor based on a mechanical filter was developed, for the detection of infrasound within the frequency range of 0.01--1 Hz.
Peng Zhang +9 more
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Acoustic Rocket Signatures Collected by Smartphones
SignalsRockets generate complex acoustic signatures that can be detected over a thousand kilometers from their source. While many far-field acoustic rocket signatures have been collected and released to the public, very few signatures collected at distances ...
Sarah K. Popenhagen, Milton A. Garcés
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Effects of infrasound on the perception of a low-frequency sound
Acta Acustica, 2023 The study investigated the effects of an 8 Hz infrasound sinusoid, presented at a sensation level (SL) of 9 decibels (dB), on the detection of i) a 64 Hz pure tone and ii) an 8 Hz sinusoidal amplitude modulation imposed on a 64 Hz sinusoidal carrier ...
Friedrich Björn +3 more
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The Journal of the Acoustical Society of AmericaWaterfalls are long-lasting sources of continuous infrasound with relevance to multiple acoustic fields. This paper presents infrasonic observations of 11 waterfalls spanning wide ranges of hydraulic power, discharge, and height. The waterfall recordings had similar spectral shapes, including an abrupt rise from low-frequency background noise, a mid ...
Jacob F. Anderson +2 more
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Data_Sheet_1_Zebrafish aversion to infrasound in an open field test.xlsx
, 2023 Aquatic species are capable of detecting infrasound (sub-20 Hz frequencies) which may be a source of anthropogenic pollution and have a detrimental impact on the environmental fitness of fish. Infrasound is generated by infrastructure, producing acoustic
Kale R. Scatterty (14335995) +4 more
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Study on precursory characteristics of granite failure based on infrasonic energy
Results in Physics, 2017 To study signal characteristics of precursory infrasound of granite failure, coal-rock stress loading device and infrasound acquisition device were adopted to perform infrasound test in uniaxial loading process for granite samples.
Jian-ping Wei +3 more
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