A COMPARATIVE STUDY OF SINGLE & DUAL-SCREEN WINDSHIELD DESIGN APPROACHES FOR NOISE MEASUREMENT IN HIGH WIND ENVIRONMENTS

A COMPARATIVE STUDY OF SINGLE & DUAL-SCREEN
WINDSHIELD DESIGN APPROACHES FOR NOISE
MEASUREMENT IN HIGH WIND ENVIRONMENTS
David P. Robinson, Cirrus Research plc
In recent years, the recommendation and use of a dual-screen design windshield for improved
reduction of wind-induced microphone self-noise has become a topic of much discussion. While
descriptions and examples of such apparatus can now be found in the standard working procedures
documentation, such asIE0 64100-11, there remains no standardised form nor dimensions for this
design concept of windshield, leading to various interpretations being now available from equipment
manufacturers. In previous work, apparatus has been developed whichutilises a spinning bar
approach to wind testing, as opposed to low-noise wind tunnel facilities. This report presents the
data acquired from the use of this equipment with a variety of dual-screen windshield designs.
Discussion is also made regarding the issues. differences and validity of simulated outdoor wind
environments of the experimental methods, plus the possible requirement for standardised methods
of testing windscreens in laboratory and/or real-world conditions