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Reverberant Chamber Enhancement
Journal of the IEST, 2015Typical reverberant chambers used for High Intensity Acoustic Testing (HIAT) can achieve high sound pressure levels (SPL) across most of the applicable frequency range (20 Hz to 10 kHz), but they have limitations. Depending on the size of the chamber, low frequency chamber modes may be limited in the testing frequency range.
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Measurements in the Reverberation Chamber
The Journal of the Acoustical Society of America, 1939Our idea of the sound absorption coefficient of a surface is carried over from the optical analogy of the reflectivity of a surface for light. All reverberation theory and methods of measurement of absorption coefficients now extant are based on this conception of the dissipation of sound energy within a closed space.
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EMC Measurement in a Reverberation Chamber
Applied Mechanics and Materials, 2013A reverberation chamber, which is a test facility for various electromagnetic compatibility tests, uses a stirrer to generate a uniform electric field inside it. However, a stirrer is a big unit and has difficulties in maintenance. This paper adopted an idea of a diffuser from acoustics to overcome the problems of a stirrer and presents a substitution ...
Eugene Rhee, Ji Hoon Lee
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Characterization of a Reverberation Chamber
2015Abstract : There is an increasing interest in the use of reverberation chambers with mode mixing for testing of electromagnetic susceptibility and immunity of a device under test because of its repeatability and measurement speed. A reverberation chamber is characterized as an environment with uniform, randomly polarized, isotropic fields throughout ...
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Active transmitters in a reverberation chamber
2010 Asia-Pacific International Symposium on Electromagnetic Compatibility, 2010This study reports on experiences with EMC testing of strong active transmitters in a reverberation chamber (RC). The main objective of this study was to evaluate the risk of disturbing or even destroying equipment under test in a reverberation chamber.
Markus Rothenhaeusler, Matthias Hahn
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Reverberation Chamber Measurement Correlation
IEEE Transactions on Electromagnetic Compatibility, 2012This contribution evaluates the utility of several different metrics for studying correlation between reverberation chamber measurements collected at different stirrer positions. Metrics considered are the autocovariance, the correlation matrix, and two metrics based upon the entropy of the data correlation matrix: 1) the effective number of ...
R. J. Pirkl +2 more
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Acoustic design of a reverberation chamber
Applied Acoustics, 1991Abstract It is of great importance in acoustic design to establish a diffuse sound field in a reverberation chamber. Though various attempts have been made to establish sound diffusion in most existing reverberation chambers, the results were not good enough, and consequently extra diffusers have had to be installed.
Xiang Duanqi, Wang Zheng, Chen Jinjing
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Tests on loudspeakers in a reverberation chamber
IEEE Transactions on Audio and Electroacoustics, 1969The methods and equipment for measuring the characteristics of a loudspeaker in a reverberation chamber are described. Analogous setups can be created under manufacturing plant conditions. The reverberation method is shown to possess a number of advantages in comparison with more generally accepted methods, and it is recommended for use in the ...
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Reverberation chambers at low frequencies
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261), 1999This report documents the effects of corrugated walls on the uniformity of the electromagnetic environment within a small (1.8 m/spl times/1.2 m/spl times/0.8 m) reverberation chamber. The frequency band evaluated was 150 MHz to 650 MHz, taking 5 MHz steps. At each frequency 100 tuner steps were made, resulting in one complete tuner rotation.
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