Results 1 to 10 of about 1,535 (264)
Visual and acoustic performance of shading devices – real scale laboratory measurements [PDF]
E3S Web of Conferences, 2019 There are several physical parameters that are taken into consideration when determining the level of agreeability of an enclosed space. For instance, when choosing the louvers for a room there are a multitude of criteria that might be considered such as
Catalina Tiberiu +2 more
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Probability distributions of three‐antenna efficiency measurement in a reverberation chamber
IET Microwaves, Antennas & Propagation, 2021 Analytical expressions are derived for probability distributions of the three‐antenna efficiency measurement. The probability density function (PDF), the expected value, and the standard deviation are derived analytically. The Mellin transform is used in
Qian Xu +4 more
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Two Alternative Methods to Measure the Radiated Emission in a Reverberation Chamber
International Journal of Antennas and Propagation, 2016 One of the most important applications of a reverberation chamber is for radiated power measurement. Two new alternative methods are proposed to measure the radiated power of equipment under test in a reverberation chamber in this paper.
Qian Xu +4 more
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Megaron, 2019 This paper seeks to assess the effect of reverberation time, distribution of reverberation time over the frequency range and signal-to-noise ratio on speech intellibility by adults and children in classrooms by the use of phonetically balanced ...
Konca Saher, Baki Karaböce
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Parametric Testing of Metasurface Stirrers for Metasurfaced Reverberation Chambers
Sensors, 2019 In this paper, the correlation coefficients and the total scattering cross sections (TSCSs) for different types of metasurfaced stirrers and the traditional metallic stirrer, and the effects on field uniformity when such stirrers are used in ...
Hengyi Sun +9 more
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A Reverberation Chamber with Polycylindrical Walls [PDF]
The Journal of the Acoustical Society of America, 1951 A reinforced concrete reverberation chamber has been constructed with diffusing cylinders of random size cast in the ceiling and walls. Energy loss in the empty chamber is low because the rigid, heavily enameled walls have a low absorption coefficient and the attenuation loss in the air is moderate for such a small volume.
J. H. Botsford, R. B. Watson, R. N. Lane
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IEEE Access, 2020 Two measurement-based methods are presented to quantify the whole-body-averaged specific absorption rate (WBA-SAR) and local SAR for small animals in a medium-size reverberation chamber (RC) for a bio-effect experiment at frequencies above 10 GHz.
Jingjing Shi +5 more
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Random Sound Field in Reverberation Chambers
The Journal of the Acoustical Society of America, 1959 A series of experiments were performed to compare the efficiency of different diffusing devices in producing a completely random sound field in a reverberation chamber and the effectiveness of some of the methods for judging whether a sound field is completely random.
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Measurements of acoustics properties for level-dependent ear-muffs
Archives of Acoustics, 2003 The aim of this paper is to present methods of acoustic measurements of level-dependent ear-muffs with an electronic sound restoration system switched off and on, according to EN 352-4.
D. Puto, E. Kotarbińska
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Experimental Verification of the Weibull Distribution in a Reverberation Chamber
International Journal of Antennas and Propagation, 2019 A Weibull distribution has been proposed for the probability density function (PDF) of the magnitude of the E-field in a reverberation chamber (RC). However, the Weibull distribution has two parameters, and if the parameters are position sensitive, the ...
Jianhua Xu, Yongjiu Zhao, Qian Xu
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