Results 241 to 250 of about 18,047 (294)
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Explosion localization via infrasound
The Journal of the Acoustical Society of America, 2009Two acoustic source localization techniques were applied to infrasonic data and their relative performance was assessed. The standard approach for low-frequency localization uses an ensemble of small arrays to separately estimate far-field source bearings, resulting in a solution from the various back azimuths. This method was compared to one developed
Curt A L, Szuberla +2 more
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A portable infrasound generator
The Journal of the Acoustical Society of America, 2009The rotary subwoofer is a novel low frequency transducer capable of efficiently generating infrasound from a compact source. A field-deployable version of this device may find application as a calibration source for infrasound arrays of the International Monitoring System (IMS) [(2001).
Joseph, Park, James, Robertson
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The Redmond Salt Mine Monitoring Experiment: Observations of Infrasound Resonance
Bulletin of The Seismological Society of America (BSSA), 2022From October 2017 to July 2019, we collected seismic recordings of nighttime mining explosions occurring at Redmond Salt Mine. In addition to seismic data, infrasound recordings of the explosions were collected from October 2017 to June 2018.
N. Downey, S. Albert, R. Tibi
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The Journal of the Acoustical Society of America, 1974
The distortion of pure tones (1–16 Hz) caused by the nonlinearities of the middle ear was calculated. It is shown that the slope of the audibility curves for infrasound of Yeowart and Evans could be predicted, thus implying that infrasound might not be heard in the normal sense, but only heard as distortion after being transduced through the middle ear.
Daniel L. Johnson, H. von Gierke
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The distortion of pure tones (1–16 Hz) caused by the nonlinearities of the middle ear was calculated. It is shown that the slope of the audibility curves for infrasound of Yeowart and Evans could be predicted, thus implying that infrasound might not be heard in the normal sense, but only heard as distortion after being transduced through the middle ear.
Daniel L. Johnson, H. von Gierke
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Infrasound signals in simulated nontornadic and pre-tornadic supercells.
Journal of the Acoustical Society of America, 2022There has been increased interest in improving severe weather detection by supplementing the conventional operational radar network with an infrasound observation network, which may be able to detect distinct sub-audible signatures from tornadic ...
Brice E Coffer, M. Parker
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Journal of Geophysical Research: Atmospheres, 2005
Infrasonic signals have been observed from 31 earthquakes by arrays of microphones operated by the Los Alamos National Laboratory between 1983 and 2003. The properties of the signals are presented. Signal amplitudes corrected for propagation and distance show a relation with seismic magnitude.
J. Paul Mutschlecner, Rodney W. Whitaker
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Infrasonic signals have been observed from 31 earthquakes by arrays of microphones operated by the Los Alamos National Laboratory between 1983 and 2003. The properties of the signals are presented. Signal amplitudes corrected for propagation and distance show a relation with seismic magnitude.
J. Paul Mutschlecner, Rodney W. Whitaker
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Infrasound From a Buried Chemical Explosion Recorded on a Balloon in the Lower Stratosphere
Geophysical Research Letters, 2021Infrasound waveforms generated by natural and anthropogenic phenomena contain important clues about the size and nature of the event. We show that sensors on balloons in the lower stratosphere can record faithful representations of the near‐source ...
D. Bowman, S. Krishnamoorthy
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Snow Avalanche Detection and Source Constraints Made Using a Networked Array of Infrasound Sensors
Journal of Geophysical Research: Earth Surface, 2021We studied a triggered snow avalanche (∼60 s in duration and with ∼1,100 m run‐out) using a network of infrasound arrays and time‐synced video, with the objective of understanding the relationship between infrasound generation and flow dynamics.
Jeffrey B. Johnson +4 more
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The Journal of the Acoustical Society of America, 2001
At the present developed procedures of evaluation of annoyance of low frequency noise (LFN) on human and occupational health are based on international standards, ISO 7196 and ISO 9612. These standards are based on levels of thresholds of the human auditory system and subjective observations of vibrations of human body impacted by infrasound waves.
Ryszard Panuszka, Zbigniew Damijan
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At the present developed procedures of evaluation of annoyance of low frequency noise (LFN) on human and occupational health are based on international standards, ISO 7196 and ISO 9612. These standards are based on levels of thresholds of the human auditory system and subjective observations of vibrations of human body impacted by infrasound waves.
Ryszard Panuszka, Zbigniew Damijan
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Infrasound radiation of cyclones
The Journal of the Acoustical Society of America, 2005Tropical cyclones produce strong perturbations of atmosphere and the ocean surface accompanied by acoustical radiation. Infrasonic signals in the 0.1−0.5 frequency band can be observed at distances of thousands of miles from the cyclone. The effect of infrasound radiation is connected apparently to the interaction of the counter-propagating sea-surface
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