Results 71 to 80 of about 458,352 (202)

Acoustic analysis of a semi-anechoic chamber with intersection

بهداشت و ایمنی کار, 2014
Introduction: The previous studies have used fibrous absorbents usually in the form of cone-shaped wedges for making anechoic and semi-anechoic chambers which their design and construction have been costly and difficult. The present study aimed to design
P. Nassiri, M. R. Monazzam, F. Zivary Delavar   +2 more
doaj  

High-Frequency Estimation of Shielding Effectiveness Without Inner Sensor in Reverberation Chambers

IEEE transactions on electromagnetic compatibility (Print)
The purpose of this article is to present a new method for measuring the shielding effectiveness (SE) of enclosures without the use of an internal sensor.
P. Besnier, J. Sol, M. Klingler, F. Sarrazin   +3 more
semanticscholar   +1 more source

Electromagnetic Reverberation Chambers

, 2011
Dedicated to a complete presentation on all aspects of reverberation chambers, this book provides the physical principles behind these test systems in a very progressive manner.
Démoulin, Bernard, Demoulin, Bernard,, Besnier, Philippe, Besnier, Philippe,   +3 more
core   +1 more source

A Framework for Comparing and Predicting Stirrer Efficiencies in Different Reverberation Chambers

IEEE transactions on electromagnetic compatibility (Print)
The concept of stirring coherence time has been recently introduced as an effective way of measuring the ability of a mechanical stirrer to introduce disorder in a reverberation chamber (RC) and predicting the stirrer efficiency under any loading ...
A. Cozza
semanticscholar   +1 more source

Spatiotemporal energy‐density distribution of time‐reversed electromagnetic fields

IET Science, Measurement & Technology
Time reversal exploits the invariance of electromagnetic wave propagation in reciprocal and lossless media to localize radiating sources. Time‐reversed measurements are back‐propagated in a simulated domain and converge to the unknown source location ...
Elias Le Boudec, Hamidreza Karami, Nicolas Mora, Farhad Rachidi, Marcos Rubinstein, Felix Vega   +5 more
doaj   +1 more source

Methodology for Testing Acoustic Absorption of Lightweight Fabrics with 3D Microstructures Using Impedance Tube

Acoustics
In this study, the limits of using the impedance tube, or Kundt tube, are examined using the two-microphone method to obtain the normal acoustic absorption coefficient when analyzing the sound absorption properties of lightweight acoustic fabrics ...
David Caballol, Mónica Morales-Segura, Alejandro Morgado   +2 more
doaj   +1 more source

Sensitivity Enhancement of a Non-Invasive Shielding Effectiveness Measurement Method in Reverberation Chambers

International Conference on Embedded and Multimedia Computing
A recently published paper has introduced a shielding effectiveness (SE) measurement principle for which it is not necessary to place an internal sensor in the enclosure under test (EUT).
P. Besnier, J. Sol, F. Sarrazin
semanticscholar   +1 more source

Full-Wave Characterization of Reverberation Chambers for Rodent Bioassays: Methodology and Realistic-Loading Impact Analysis

IEEE Access
This study presents a comprehensive full-wave numerical dosimetry approach for large-scale rodent bioassays in Reverberation Chambers (RCs), improving upon prior methods that rely on idealized Plane Wave (PW) superposition. A “digital twin”
Antonio Faraone, Giorgi Bit-Babik, Kevin Sanderson, Paola Russo, Alfredo de Leo, Valter Mariani Primiani, Valerio de Santis   +6 more
doaj   +1 more source