منابع مشابه
Attenuation of noise by motorcycle safety helmets.
For workers such as police motorcyclists or couriers, traffic and engine noise reaching the ears is an important factor contributing to the overall condition of their work. This noise can be reduced with motorcycle helmets. In this study, insertion loss of motorcycle helmets was measured with the microphone-in-real-ear technique and sound attenuation with the real-ear-at-threshold method. Resul...
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A new method for globallw reducing the amount of unwanted Power radiated bv acoustic sourcesy bw means of active devices, is Proposed. After examining PreviouslY reported passive and active noise attenuating technioues, and finding them to be unsuitable for some applications, a new method is Proposed. The scheme involves Placin an attenuating source close to the noise sourcer driven in such a w...
متن کاملAttenuation of Cavity Bay Noise
Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including ...
متن کاملAttenuation of Industrial Noise by FFT based Adaptive MDCT
–Industrial noise induced hearing loss is an increasingly prevalent disorder that is the result of exposure to high intensity sounds, especially over a long period of time. Noises of industry can cause partial deafness, interference with communication by speech and annoy. These undesirable effects are best avoided by reducing the noise to acceptable levels. Several investigations on industrial ...
متن کاملSome Physical and Psychological Aspects of Noise Attenuation by Vegetation
-The physical mechanisms governing sound attenuation by foliage, stems, and ground are reviewed. Reflection of sound energy is found to be the primary mechanism. In addition, new experimental results are discussed that help to quantify the psychological effect of a plant barrier on perceived noise level. Listeners judged the loudness of noise transmitted through hemlock trees and through a mini...
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ژورنال
عنوان ژورنال: Journal of Agricultural Engineering
سال: 2019
ISSN: 2239-6268,1974-7071
DOI: 10.4081/jae.2019.889