Results 11 to 20 of about 99,340 (315)
An experimental study of noise reduction of portable generator using local made acoustic enclosure
Wasit Journal of Engineering Sciences, 2023 Portable generators are now widely used in shops, offices, and homes to provide electrical power during power outages in Iraq. However, these generators produce a lot of noise emitted from rotating mechanical parts and fuel combustion inside engine ...
1dalal9 kareem +2 more
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Birdsong and Sound Transmission: The Benefits of Reverberations [PDF]
The Condor, 2002 Abstract Animal vocalizations used for long-distance communication are shaped by acoustic properties of the environment. Studies of the relationship between signal design and sound transmission typically focus on habitat-induced limitations due to signal attenuation and degradation. However, signal design may not entirely be explained by
Slabbekoorn, H.W. +2 more
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Effect of Fiber Chemical Treatments on Rice Straw Fiber Reinforced Composite Properties
Journal of Natural Fibers, 2022 This work reports the effect of alkali, enzyme, and their sequential combination treatment on rice straw fiber properties (fiber diameter, aspect ratio, fiber length, bundle strength and elongation).
Neenu Poonia +4 more
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Experimental study on optimization of low frequency acoustic transmission frequency in loose coal
Meikuang Anquan, 2022 The selection of signal frequency in acoustic temperature measurement technology is the key to improve the accuracy of temperature measurement. In order to explore the optimal propagation frequency of low-frequency sound waves in loose coal, lignite ...
DENG Jun, QU Gaoyang, REN Shuaijing, WANG Caiping, ZHAO Xiaoyong
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Sound transmission testing of polymer compounds [PDF]
, 2012 This is the post-print version of the final paper published in Polymer Testing. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ...
Silver, J +3 more
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Evaluation by industrial workers of passive and level-dependent hearing protection devices
Noise and Health, 2011 Level-dependent hearing protection devices (HPDs) provide protection from intense sound, while offering amplification for speech and other signals in lower levels of noise.
Jennifer B Tufts +3 more
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Case Studies in Construction Materials, 2021 Timber usage in the Australian construction industry has significantly increased due to its strength, aesthetic properties and extended allowances recently introduced in building codes.
Amitha Jayalath +4 more
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A note on the sound transmission of a spherical sound wave through a double plate structure [PDF]
JASA Express Letters, 2021 The sound transmission of a spherical wave through a double plate structure is theoretically and numerically analyzed. Unlike the plane wave incidence, it is demonstrated that the sound transmission loss due to the spherical sound wave incidence follows ...
Xiaofeng Wang, Bilong Liu, Hongbo Zhang
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Modeling sound propagation in acoustic waveguides using a hybrid numerical method [PDF]
, 2008 Sound propagation in an acoustic waveguide is examined using a hybrid numerical technique. Here, the waveguide is assumed to be infinite in length with an arbitrary but uniform cross-section.
Kirby, R, Ray Kirby
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Sound transmission loss of particulate filter of exhaust system by homogenization method
Nihon Kikai Gakkai ronbunshu, 2022 Diesel or gasoline particulate filters are included in almost all vehicles to clean emission gas from internal combustion engines. On the other hand, a new regulation for vehicle noise emission has been into operation, and noise from exhaust system must ...
Yusuke AKIMOTO +2 more
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