Infrasonic Detection

Abstract

Infrasonic signals have traditionally been hard to detect because of wind and background noise interference. A new type of hardened foam windscreen, which was designed at NASA, was tested to determine how well it works at reducing noise. Different densities and shapes were tested at different elevations. The windscreens were quite effective at filtering out superfluous background noise. The medium density, sphere-shaped windscreen was the most effective at reducing background noise. These windscreens should be effective tools in future infrasonic research. More rigorous tests should be performed in order to better catalog the exact properties of the windscreens, such as how they perform at different temperatures, elevations, and humidities.