Results 221 to 230 of about 1,535 (264)

FDTD-FVTD Comparisons in Reverberation Chamber

18th International Wroclaw Symposium and Exhibition on Electromagnetic Compatibility, 2006
Modelling of a Mode Stirred Reverberation Chamber (MSRC) using time-domain techniques is achieved by using Finite-Difference Time-Domain (FDTD) and Finite-Volume Time-Domain (FVTD) schemes. Advantages and difficulties related to time domain simulations in MSRC are underlined in this paper.
Lalléchère, Sébastien, Bonnet, Pierre, Paladian, Françoise   +2 more
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EMC Measurement in a Reverberation Chamber

Applied Mechanics and Materials, 2013
A 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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Measurements in the Reverberation Chamber

The Journal of the Acoustical Society of America, 1939
Our 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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Characterization of a Reverberation Chamber

2015
Abstract : 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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Acoustic design of a reverberation chamber

Applied Acoustics, 1991
Abstract 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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Active transmitters in a reverberation chamber

2010 Asia-Pacific International Symposium on Electromagnetic Compatibility, 2010
This 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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Tests on loudspeakers in a reverberation chamber

IEEE Transactions on Audio and Electroacoustics, 1969
The 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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Qualification of WEAL Reverberation Chamber

The Journal of the Acoustical Society of America, 2001
Western Electro-Acoustic Laboratory (WEAL) has recently qualified a new reverberation chamber. Qualification measurements were performed for absorption testing (ASTM C423) and sound power testing (ANSI S12.31 and S12.32). Results are shown at various stages of the qualification.
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Boundary Fields in Reverberation Chambers

IEEE Transactions on Electromagnetic Compatibility, 2005
A previous plane-wave integral representation for fields in a reverberation chamber is extended to analyze fields near the boundaries of a rectangular chamber. The field point can be located near a single wall, a right-angle bend, or a right-angle corner. Multiple image theory is used to ensure exact boundary conditions.
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Reverberation chambers at low frequencies

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261), 1999
This 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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