keyword
https://read.qxmd.com/read/38445987/on-site-infrasound-calibration-to-correct-wave-parameter-estimation
#1
JOURNAL ARTICLE
S K Kristoffersen, A Le Pichon, M Schwardt, P Vincent, B Doury, F Larsonnier, C Pilger
The International Monitoring System (IMS) has been established as part of the Comprehensive Nuclear-Test-Ban Treaty to monitor nuclear testing and is comprised of infrasound, hydroacoustic, seismic, and radionuclide stations; it is also used more widely by the scientific community for scientific and civilian applications. For the infrasound stations, on-site calibration provides an accurate measure of the sensor (microbarometer + wind-noise reduction system) frequency response, used to monitor that the sensor response remains within tolerance of the baseline established when the station is certified...
March 1, 2024: Journal of the Acoustical Society of America
https://read.qxmd.com/read/38426834/prediction-of-regional-infrasound-produced-by-supersonic-sources-using-a-ray-based-mach-cone-source
#2
JOURNAL ARTICLE
Philip Blom, Christine Gammans, Brent Delbridge, Joshua D Carmichael
The geometry of the Mach cone produced by a supersonic source is analyzed and mapped into initial conditions used in acoustic ray tracing. The resulting source model is combined with spherical geometry ray tracing methods to enable propagation simulations for infrasonic signals produced by bolides, space debris, rockets, aircraft, and other fast-than-sound sources out to typical infrasonic observation distances of hundreds or thousands of kilometers. Idealized linear and parabolic trajectories typical of bolides and rockets, respectively, are used to demonstrate the calculation of regional infrasonic signals produced by such sources and characteristics of the radiated infrasonic waves are found to vary strongly with the geometry of the trajectory and atmospheric structure...
March 1, 2024: Journal of the Acoustical Society of America
https://read.qxmd.com/read/38251979/direct-numerical-simulations-of-long-range-infrasound-propagation-implications-for-source-spectra-estimation
#3
JOURNAL ARTICLE
Liam J Tope, Jae Wook Kim, Peter Spence
The evolution of observed dominant frequencies from a high-intensity infrasonic pulse with receiver range and stratospheric temperature is investigated using direct numerical simulations of the two-dimensional unsteady compressible Navier-Stokes equations. There is a high level of uncertainty in estimating source dominant frequencies based on received signals at sparse points on the ground. Nonlinear propagation effects in the ground-level thermospheric arrivals are found to significantly alter dominant frequency measurements compared to stratospheric arrivals with smaller amplitude sources...
January 1, 2024: Journal of the Acoustical Society of America
https://read.qxmd.com/read/38174967/finite-frequency-modeling-of-regional-tropospheric-infrasound-using-realistic-atmospheres-and-terrain
#4
JOURNAL ARTICLE
Jordan W Bishop, Philip Blom, David Fee
Infrasonic waves have been observed to propagate to regional (greater than 15 km) distances through the troposphere. Infrasound propagation in the geometric acoustics approximation has shown that realistic terrain can scatter acoustic energy from tropospheric ducts; however, ray methods cannot intrinsically capture finite-frequency behavior such as diffraction. A two-dimensional finite-difference time-domain (FDTD) method has been developed to solve linearized equations for infrasound propagation with realistic terrain...
January 1, 2024: Journal of the Acoustical Society of America
https://read.qxmd.com/read/38110991/inhibition-of-astroglial-hemichannels-ameliorates-infrasonic-noise-induced-short-term-learning-and-memory-impairment
#5
JOURNAL ARTICLE
Wei Zhang, Jue Yin, Bei-Yao Gao, Xi Lu, Ya-Jing Duan, Xu-Yan Liu, Ming-Zhen Li, Shan Jiang
As a kind of environmental noise, infrasonic noise has negative effects on various human organs. To date, research has shown that infrasound impairs cognitive function, especially the ability for learning and memory. Previously, we demonstrated that impaired learning and memory induced by infrasound was closely related with glia activation; however, the underlying mechanisms remain unclear. Connexin 43 hemichannels (Cx43 HCs), which are mainly expressed in hippocampal astrocytes, are activated under pathological conditions, lending support to the hypothesis that Cx43 HCs might function in the impaired learning and memory induced by infrasound...
December 18, 2023: Behavioral and Brain Functions: BBF
https://read.qxmd.com/read/38104341/-impact-of-infrasound-and-low-frequency-noise-on-human-health-and-well-being-part-ii-review-of-epidemiological-studies
#6
REVIEW
Pawlaczyk-Łuszczyńska Małgorzata, Adam Dudarewicz, Iryna Myshchenko, Alicja Bortkiewicz
This paper summarizes the currently available knowledge on the impact of infrasound (IS) and low frequency noise (LFN) on human health and well-being. This narrative review of the literature data was based on the selected, mostly, peer-reviewed research papers, review articles, and meta-analyses that were published in 1971-2022. It has been focused on the results of epidemiological studies concerning the annoyance related to infrasound and low frequency noise, as well as their impact on the cardiovascular system and sleep disorders...
December 15, 2023: Medycyna Pracy
https://read.qxmd.com/read/38036586/the-optical-seismic-and-infrasound-signature-of-the-march-5-2022-bolide-over-central-italy
#7
JOURNAL ARTICLE
Marco Olivieri, Davide Piccinini, Gilberto Saccorotti, Dario Barghini, Daniele Gardiol, Nicola Alessandro Pino, Maurizio Ripepe, Giulio Betti, Giorgio Lacanna, Lorenzo Arcidiaco
On March 5, 2022, a 12 kg meteoroid crossed the sky above Central Italy and was observed by three different observational systems: the PRISMA all-sky camera network (10 stations), the Italian national seismic network (61 stations), and a 4-element infrasound array. The corresponding datasets, each with its own resolution, provided three independent assessments of the trajectory, size and speed of the meteoroid. The bolide traveled across central Italy with an azimuth of 102 degrees, becoming visible at about 91 km above sea level with a velocity of about 15...
November 30, 2023: Scientific Reports
https://read.qxmd.com/read/38015754/history-of-blood-pressure-measurement-in-newborns-and-infants
#8
JOURNAL ARTICLE
K Javorka
The development of methods for measuring blood pressure (BP) in newborns and small children has a rich history. Methods for BP measuring in adults had to be adapted to this age group. For measuring BP in direct invasive way, a suitable approach had to be found to access the arterial circulation through the umbilical and later radialis artery. Currently, results obtained from direct invasive BP measurement are considered the "gold standard". The development of non-invasive methods for BP measuring in newborns and children began with the use of von Basch's sphygmomanometer (1880)...
November 28, 2023: Physiological Research
https://read.qxmd.com/read/37966387/-impact-of-infrasound-and-low-frequency-noise-on-human-health-and-well-being-part-i-review-of-experimental-studies
#9
REVIEW
Małgorzata Pawlaczyk-Łuszczyńska, Adam Dudarewicz, Iryna Myshchenko, Alicja Bortkiewicz
This paper summarizes the currently available knowledge on the impact of infrasound and low frequency noise (LFN) on human health and well-being. This narrative review of the literature data was based on the selected, mostly, peer-reviewed research papers, review articles, and meta-analyses that were published in 1973-2022. It has been focused on infrasound perception, annoyance attributed to infrasound and low-frequency noise, as well as their effects on the cardiovascular system and sleep disorders. Particular attention was also paid to the latest research results and specific sources of infrasound and LFN, i...
November 14, 2023: Medycyna Pracy
https://read.qxmd.com/read/37963914/assessment-of-eruption-source-parameters-using-infrasound-and-plume-modelling-a-case-study-from-the-2021-eruption-of-mt-etna-italy
#10
JOURNAL ARTICLE
Silvio De Angelis, Luciano Zuccarello, Simona Scollo, Luigi Mereu
Atmospheric injection of volcanic ash during eruptions is a threat to aviation. Reliable forecast of airborne ash dispersal relies on empirical and numerical models. Key inputs into these models are so-called eruption source parameters such as the rate at which pyroclastic material is ejected from the vent and the maximum height of eruptive columns. Here, we use infrasound data recorded during eruptive activity in June 2021 at Mt. Etna, Italy, to demonstrate its potential for assessment of eruption rates in near-real time...
November 13, 2023: Scientific Reports
https://read.qxmd.com/read/37942938/noise-induced-sleep-disruption-from-wind-turbines-scientific-updates-and-acoustical-standards
#11
JOURNAL ARTICLE
Jeffrey M Ellenbogen, Colleen B Kellam, Michael Hankard
Wind energy appears to place global environmental benefits against local human health, particularly sleep. The result is a significant challenge to wind-energy development for the achievement of large-scale alternative energy. Our purpose is to examine noise from wind turbines and its potential to disrupt sleep; to examine the human health literature addressing these concerns; and to provide insight into how developers and communities can employ these concepts to pursue wind energy without impacting human health...
November 6, 2023: Sleep
https://read.qxmd.com/read/37818147/evaluation-of-low-frequency-noise-infrasound-and-health-symptoms-at-an-administrative-building-and-men-s-shelter-a-case-study
#12
REVIEW
Sophia K Chiu, Scott E Brueck, Douglas M Wiegand, Hannah L Free, Hannah Echt
Responses to complaints about low-frequency noise and infrasound at workplaces have not been extensively documented in the literature. The National Institute for Occupational Safety and Health evaluated low-frequency noise, infrasound, and health symptoms among employees of an organization providing services to homeless persons. The organization's campus was evacuated after two loud noise and vibration incidents related to methane flare on an adjacent landfill. Employees were interviewed about health symptoms, perceptions of noise, and how the incidents were handled...
November 2023: Seminars in Hearing
https://read.qxmd.com/read/37812719/albatross-movement-suggests-sensitivity-to-infrasound-cues-at-sea
#13
JOURNAL ARTICLE
Natasha Gillies, Lucía Martina Martín López, Olivier F C den Ouden, Jelle D Assink, Mathieu Basille, Thomas A Clay, Susana Clusella-Trullas, Rocío Joo, Henri Weimerskirch, Mario Zampolli, Jeffrey N Zeyl, Samantha C Patrick
The ways in which seabirds navigate over very large spatial scales remain poorly understood. While olfactory and visual information can provide guidance over short distances, their range is often limited to 100s km, far below the navigational capacity of wide-ranging animals such as albatrosses. Infrasound is a form of low-frequency sound that propagates for 1,000s km in the atmosphere. In marine habitats, its association with storms and ocean surface waves could in effect make it a useful cue for anticipating environmental conditions that favor or hinder flight or be associated with profitable foraging patches...
October 17, 2023: Proceedings of the National Academy of Sciences of the United States of America
https://read.qxmd.com/read/37812705/albatrosses-orient-towards-infrasound-while-foraging
#14
JOURNAL ARTICLE
Lesley H Thorne
No abstract text is available yet for this article.
October 17, 2023: Proceedings of the National Academy of Sciences of the United States of America
https://read.qxmd.com/read/37672305/modeling-and-characterizing-urban-infrasonic-and-low-frequency-noise-in-the-las-vegas-nv-regiona
#15
JOURNAL ARTICLE
Nora R Wynn, Fransiska K Dannemann Dugick
Empirical models of ambient infrasound noise are valuable tools for assessing the detection capabilities of infrasound networks on local to global scales. Models that characterize noise in unpopulated, quiet environments are well established, and there is a detailed understanding of the sources that contribute to rural noise profiles. However, there is a research gap for infrasound and low-frequency noise in urban environments, based on the assumption that high noise levels generated by human activity will render signals of interest, such as earthquakes and explosions, undetectable...
September 1, 2023: Journal of the Acoustical Society of America
https://read.qxmd.com/read/37648860/identifying-attacks-in-the-russia-ukraine-conflict-using-seismic-array-data
#16
JOURNAL ARTICLE
Ben D E Dando, Bettina P Goertz-Allmann, Quentin Brissaud, Andreas Köhler, Johannes Schweitzer, Tormod Kværna, Alexander Liashchuk
Seismometers are generally used by the research community to study local or distant earthquakes, but seismograms also contain critical observations from regional1,2 and global explosions3 , which can be used to better understand conflicts and identify potential breaches of international law. Although seismic, infrasound and hydroacoustic technology is used by the International Monitoring System4 to monitor nuclear explosions as part of the Comprehensive Nuclear-Test-Ban Treaty, the detection and location of lower-yield military attacks requires a network of sensors much closer to the source of the explosions...
August 30, 2023: Nature
https://read.qxmd.com/read/37523364/temporal-integration-of-infrasound-at-threshold
#17
JOURNAL ARTICLE
Björn Friedrich, Holger Joost, Thomas Fedtke, Jesko L Verhey
Infrasounds are signals with frequencies below the classical audio-frequency range, i.e., below 20 Hz. Several previous studies have shown that infrasound is audible as well, provided that the sound level is high enough. Hence, the sound pressure levels at threshold are much higher than those in the classical audio-frequency range. The present study investigates how the duration and the shape of the temporal envelope affect thresholds of infrasound stimuli in quiet. Two envelope types were considered: one where the duration of the steady state was varied (plateau bursts) and one where the number of consecutive onset-offset bursts was varied (multiple bursts)...
2023: PloS One
https://read.qxmd.com/read/37419913/frozen-sound-an-ultra-low-frequency-and-ultra-broadband-non-reciprocal-acoustic-absorber
#18
JOURNAL ARTICLE
Anis Maddi, Come Olivier, Gaelle Poignand, Guillaume Penelet, Vincent Pagneux, Yves Aurégan
The absorption of airborne sound is still a subject of active research, and even more since the emergence of acoustic metamaterials. Although being subwavelength, the screen barriers developed so far cannot absorb more than 50% of an incident wave at very low frequencies (<100 Hz). Here, we explore the design of a subwavelength and broadband absorbing screen based on thermoacoustic energy conversion. The system consists of a porous layer kept at room temperature on one side while the other side is cooled down to a very low temperature using liquid nitrogen...
July 7, 2023: Nature Communications
https://read.qxmd.com/read/37403990/infrasound-tones-at-sensation-threshold-level-elicit-measurable-frequency-following-responses
#19
JOURNAL ARTICLE
Carlos Jurado, Marcelo Larrea, Juan Vizuete, Mabel Torres, Christiam Garzón, Alberto Rodriguez, Torsten Marquardt
Even barely detectable levels of infrasound are often reported to cause annoyance and complaints. We carefully measured the individual sensation threshold of a pure tone and recorded immediately after the brain's frequency-following response (FFR) at this intensity using the same stimulator. In contrast to 87-Hz tones, 8-Hz tones elicit an FFR already at sensation threshold. Control stimuli with trains of 1-kHz tone pips having the repetition rate of the infrasound tone frequency and sensation threshold intensities evoked no significant FFR...
July 1, 2023: Journal of the Acoustical Society of America
https://read.qxmd.com/read/37280367/hearing-in-helmeted-guineafowl-numida-meleagris-audiogram-from-2%C3%A2-hz-to-10%C3%A2-khz-and-localization-acuity-for-brief-noise-bursts
#20
JOURNAL ARTICLE
Henry E Heffner, Gimseong Koay, Rickye S Heffner
Behavioral hearing thresholds and noise localization acuity were determined using a conditioned avoidance/suppression procedure for three Helmeted guineafowl (Numida meleagris). The guineafowl responded to frequencies as low as 2 Hz at 82.5 dB SPL, and as high as 8 kHz at 84.5 dB SPL. At a level of 60 dB SPL, their hearing range spanned 8.12 octaves (24.6 Hz-6.86 kHz). Like most birds, they do not hear sounds above 8 kHz. However, the guineafowl demonstrated good low-frequency hearing (frequencies below 32 Hz), showing thresholds that are more sensitive than both the peafowl and pigeon, both of which hear infrasound...
June 6, 2023: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
keyword
keyword
11542
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.