Modelling and validation of defects on infrasound wind-noise-reduction pipe systems

Area of Science:

• Geophysics
• Acoustics
• Signal Processing

Background:

• Infrasound signals from sources like earthquakes are crucial for monitoring.
• Wind-generated noise can interfere with the detection of these faint infrasound signals.
• Pipe-array wind-noise-reduction systems (WNRSs) are employed to mitigate wind noise.

Purpose of the Study:

• To investigate the impact of operational defects on the performance of WNRSs.
• To extend existing WNRS models to incorporate system failures.
• To validate model predictions against experimental data.

Main Methods:

• Development of extended models for WNRSs, including defects such as blockages and leaks.
• Experimental testing of WNRS performance under simulated field conditions.
• Comparison of model-predicted responses with experimental observations.

Main Results:

• The developed models accurately recreated observed WNRS responses in experimental settings.
• The study successfully characterized the effects of various defects on system performance.
• Specific impacts of blockages and leaks on infrasound signal detection were quantified.

Conclusions:

• Modeled defects in WNRSs effectively replicate experimental observations.
• Understanding defect impacts is crucial for maintaining the integrity of infrasound monitoring systems.
• The validated models provide a tool for assessing WNRS performance in real-world conditions.