INFLUENCE OF ACOUSTIC REFLECTION ON MEASUREMENT LOCATIONS IN A LARGE REVERBERATION CHAMBER

Influence of acoustic reflection on measurement locations in a large reverberation chamber

S. Murugan

Vol.44 no.3, July 2017, pp: 152 – 159, Journal of Acoustical Society of India.

url: http://www.acousticsindia.org/Jasi-2017.pdf

Abstract:

High intensity acoustic testing is performed on the spacecraft and launch vehicle subsystems in large reverberation chambers.  Acoustic measurements of such tests are influenced by the reflection of sound waves from the rigid walls of the chamber.  It is therefore important to understand the reflection characteristics of the sound wave to arrive at the optimum positioning of microphones near the chamber walls for acoustic measurements.  This paper deals with the sound pressure level (SPL) at various distances from different reflecting planes in comparison with diffused or non-reflecting locations and experimentally verifies the theoretical calculations.  This paper also highlights the SPL measurement locations in a reverberation chamber defined by various standards.