Keep it simple: A right conical infrasound windscreen from off-the-shelf components

Abstract

Windscreens for higher frequency infrasound are a continued topic of discussion because the ideal has yet to be found, i.e., an inexpensive, easily shipped, compact windscreen with a flat 3 Hz to >20 Hz passband and nearly zero transmission loss. Recent research has shown that the robust porous hose, porous fabrics, and perforated metal domes are capable of filling many of those needs. However, each technology has drawbacks that necessitate further research to arrive at a greater understanding of the windscreen and to approach the ideal. Guided by this previous infrasound windscreen research, a right conical windscreen was constructed from easily obtained commercial products and subsequently tested beside previously characterized windscreens. The presentation will discuss results of the experimental program to include comparisons of power spectral densities and transfer functions.