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VERSION:2.0
PRODID:https://murmitoyen.com/events/vanille/udem/
X-WR-TIMEZONE:America/Montreal
BEGIN:VEVENT
UID:69db5db6176b3
DTSTAMP:20260412T045414
DTSTART:20170922T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20170922T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/776116-infrasound-gen
 eration-and-propagation-in-the-earths-atmosphere-roger-waxler-national-cen
 ter-for-physical-acoustics
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Infrasound Generation and Propagation in the Earth's Atmosphere - R
 oger Waxler (National Center for Physical Acoustics)
DESCRIPTION:The term infrasound is applied to low frequency sound in the at
 mosphere\, generally below the limit of human hearing. The frequencies of 
 interest in our research range from 10 Hz down to as low as 0.001 Hz\, cor
 responding to periods of 0.1 to 1000 seconds. Such signals tend to be geop
 hysical in nature\, propagating globally and generated by large\, violent 
 events such as hurricanes\, tornadoes\, earthquakes and nuclear weapon det
 onation. Their propagation depends critically on large scale temperature a
 nd wind velocity gradients. These produce a variety of acoustic ducts in t
 he atmosphere. These are asymmetric with respect to azimuth and interact w
 ith each other. They are also spatially and temporally varying\, with smal
 l scale fluctuations on top of diurnal and seasonal cycles. An overview of
  sources\, generation and propagation of infrasound in the atmosphere will
  be presented.
\nLa conférence est pour tout public et le café est servi
  dès 11h30.
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TZID:America/Montreal
X-LIC-LOCATION:America/Montreal
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