Evaluation of a hard walled room for reverberant power measurements: What is "good enough?"

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The use of reverberation rooms for the measurement of a source's radiated power is a well defined and accepted engineering practice. Reverberation room qualification and measurement requirements have been developed over many years and are defined in ISO 3741 / ANSI S12.51. Performing formal radiated power tests in a commercial chamber can often be costly and time consuming. This work investigates the use of a typical "hard-walled room", with many acoustical limitations, for obtaining useful engineering radiated power results. The room's reverberation and diffusivity are evaluated and potential limitations identified as compared to the established specifications. A stiffened aerospace grade sandwich honeycomb panel (satellite equipment panel) is tested in the room and its radiated power / radiation efficiency measured using standard power injection techniques. A second set of power injection measurements are conducted in a commercial reverberation chamber for comparison using the same panel structure. The panel radiated power / radiation efficiency results from the hard-walled room compare favorably with those made in the commercial reverberation chamber in spite of the hard-walled room's high aspect ratio and short reverberation times. Comparisons of critical room parameters such as decay rates, modal densities and modal overlap factors are also presented and their roles in the structure measurements discussed.

Original languageEnglish (US)
Title of host publication38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Pages1210-1218
Number of pages9
StatePublished - Dec 1 2009
Event38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 - Ottawa, ON, Canada
Duration: Aug 23 2009Aug 26 2009

Publication series

Name38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Volume2

Other

Other38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
CountryCanada
CityOttawa, ON
Period8/23/098/26/09

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Conlon, S. C., & Hambric, S. A. (2009). Evaluation of a hard walled room for reverberant power measurements: What is "good enough?". In 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 (pp. 1210-1218). (38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009; Vol. 2).