Results 261 to 270 of about 4,036 (298)

Statistical Model of an Undermoded Reverberation Chamber

IEEE Transactions on Electromagnetic Compatibility, 2006
Weibull distribution is adopted to model the electric field component of a Reverberation Chamber (RC). Its first property is to include the asymptotic laws, such as Rayleigh and exponential, and its main advantage lies in the fact that the Weibull shape parameter enables a model of the departure from overmoded to undermoded RC regime.
Orjubin, G, Richalot, Elodie, Mengue, S, Picon, O   +3 more
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Reverberant Chamber Enhancement

Journal of the IEST, 2015
Typical 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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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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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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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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Rationale for reverberation chamber testing

2013 US National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), 2013
Summary form only given. Several test facility options for conducting electromagnetic compatibility testing including immunity, emissions, and shielding effectiveness are available. Generally each facility provides a different test electromagnetic environment. A reverberation chamber is a cavity enclosed by conducting surfaces with a method of exciting
Vignesh Rajamani, Charles F. Bunting, Gustav J. Freyer   +2 more
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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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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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