Evaluation of Experimental Shroud Designs for the Hyperion 5201W Infrasound Sensor

Technical Report · Sun Sep 01 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1569357· OSTI ID:1569357

Slad, George William ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sandia National Laboratories has tested and evaluated various infrasound shrouds, produced Doug Seastrand and Gary Walker, DOE staff in Las Vegas, Nevada, intended for a Hyperion 5201W digital infrasound sensor. The purpose of these shrouds is to improve the infrasound sensor’s attenuation of incoherent signals, specifically those caused by wind passing by the sensor. The purpose of the shroud evaluation was to measure amplitude and phase of the sensors with a variety of shroud designs attached and determine whether there is any appreciable changes in amplitude and/or phase response over the IMS passband for infrasound applications, 0.02 Hz to 4.0 Hz. These shrouds utilize a tubule design that directs and mixes airflow from ports radially distributed at approximately 90 degree offsets in an attempt to minimize wind-generated signal due to Bernoulli effect caused by airflow passing by ports perpendicular to the wind.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1569357
• Report Number(s): SAND-2019-11102; 679814
• Country of Publication: United States
• Language: English