Correcting infrasound wave parameter estimations using in-situ calibration on defective wind-noise reduction systems

• DOI: 10.5194/egusphere-egu23-8239
• Publication Date: 2023-02-25T21:46:27Z
• Authors: Samuel Kristoffersen; Alexis Le Pichon; Paul Vincent; Michaela Schwardt; Franck Larsonnier

Infrasound signals can be detected using a time-delay of arrival approach to derive the back azimuth and trace velocity coherent wave. For these calculations, it is necessary have calibrated measure pressure. Although calibration microbarometers performed in laboratory setting with specific metrological means such as those developed by CEA, much more difficult determine transfer function wind noise reduction systems (WNRS), designed reduce associated noise. In-situ WNRS’s (as described Gabrielson*) co-located reference sensor comparing response that array (considering only highly signals) relative WNRS. System defects, flooded pipes or blocked inlets, significant impacts on response, which turn would influence calculated infrasonic wave parameters. These defects characterized in-situ measurements. To demonstrate importance measurements, experiments were undertaken at infrasound station IS26, temporary detector whose WNRS produced. This will allow for effects real detections quantified corrected calibrations. Comparisons between models experimental results characterization their parameter measurements improvements designs.* Thomas B. Gabrielson, “In situ atmospheric-infrasound sensors including wind-noise-reduction pipe systems”, The Journal Acoustical Society America 130, 1154-1163 (2011) https://doi.org/10.1121/1.3613925