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Showing 1 to 8 of 8 for “"reverberation chamber"”.
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Sound Absorption and Sound Power Measurements in Reverberation Chambers Using Energy Density Methods
Measurements in a reverberation chamber use spatially averaged squared pressure to calculate sound absorption, sound power, and other sound measurements. While a reverberation chamber provides an approximation of a diffuse sound field, variations in the measurements introduce uncertainty in …
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Development of a test facility for making in-duct sound measurements according to Astm E477-1984
… the modification and qualification of the reverberation chamber in the Multi-Function Lab at the University of Nevada, Las Vegas, for the purpose of creating a controlled sound testing environment. It also involves the design and construction of facilities for making insertion loss …
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Effect of head width, head height and clamp force on the noise reduction provided by two different styles of earmuffs
… by six (6) human subjects were determined in a reverberation chamber using the MIRE test method. Each muff-subject combination was tested twice. When all muffs were considered as a group, at least one NR test value was below 10 dBA for test forces in the range of 0.9--2.3 lbs. However, if the …
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Towards a Wireless Aircraft
… tested in a variety of environments such as a reverberation chamber and avionics bays in a Tornado, to demonstrate the levels of time delay spread needed to prevent a wireless system from working. In particular, the sta- tistical distribution of the channel is emphasised and we show how one …
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Sound absorption performance of EFBMF panel for building acoustic material
… (50:50 coir, 100 EFB dust and 80:20 dust) in the reverberation chamber. In conclusion, EFB and MF wastes are another viable alternative raw fibers that is capable to be use in many application such as for reverberation control, noise control, echo control and as a sound insulation for building.
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Biologic Influence of 900MHz Radiofrequency Identification in Rat
… system. MATERIALS AND METHODS: We established a reverberation chamber for 900MHz RFID radiation to the whole body of Sprague-Dawlye (SD) male rat. In this chamber, rats were exposed radiofrequency at different SAR value, exposure time and exposure period. We performed take a specimen and …
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Influence of Whole Body Exposure of 914 MHz Radiofrequency Identification on Endocrine system
… glucose metabolism. For these animal trials, a reverberation chamber was used as a whole-body exposure system. RFID exposure trial was performed during the day for the studies except for a study regarding the pineal melatonin biosynthesis, as RFID exposure during the night is more valid. The …