Results 11 to 20 of about 299,226 (303)
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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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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Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response [PDF]
Extreme Mechanics Letters, 2021 The problem of noise control and attenuation is of interest in a broad range of applications, especially in the low-frequency range, below 1000 Hz. Acoustic metamaterials allow us to tackle this problem with solutions that do not necessarily rely on high
D. Roca +4 more
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Jurnal Fisika Flux, 2023 Measurements of sound transmission loss have been successfully carried out on various thicknesses of nylon membrane as an absorbing material. Nylon membrane were prepared using hydrogen chloride (HCl) and acetyl aceton in the casting solution by phase ...
Wenny Maulina +2 more
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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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Broadband and Intense Sound Transmission Loss by a Coupled-Resonance Acoustic Metamaterial [PDF]
Physical Review Applied, 2021 The advent of acoustic metamaterials opened up a new frontier in the control of sound transmission. A key limitation, however, is that an acoustic metamaterial based on a single local resonator in the unit cell produces a restricted narrow-band ...
D. Roca, M. Hussein
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Glazing sound transmission loss studies [PDF]
The Journal of the Acoustical Society of America, 1986 Monsanto has recently commissioned sound transmission loss tests at Riverbank Laboratories on various glazing configurations, including single thickness, air spaced, and laminated glass. Comparisons of various parameters such as STC, glass thickness, total glazing thickness, and noise reduction performance for various noise sources are made. These data
Gregory C. Tocci +2 more
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Noise Isolation Capability for a Range of Construction Materials used in Iraq
Tikrit Journal of Engineering Sciences, 2017 This study deals with the ability of noise isolation for some type of concrete block used in Iraq. These materials are divided into groups and the noise isolation of these materials is tested by a device made locally.
Qusay K. Al-Ahmady, Muthana K. Abed
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Applied Sciences, 2021 The article focuses on the determination of the acoustic properties (sound transmission loss, sound absorption and transmission coefficient under acoustic plane wave excitation) of membrane-type of specimens by means of a combination of incident plane ...
Daniel Urbán +4 more
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Investigation of sound transmission loss of natural fiber/rubber crumbs composite panels
Journal of Industrial Textiles, 2021 Natural fibers and their waste are widely used all over the world, and their production has been increasing continuously. But, the rubber crumbs from used tire disposal are nonbiodegradable and present significant problems about their end-of-life given a
Magdy El Messiry, Yasmin Ayman
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