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Mi Li and Jianjun He
The depth of electrodes inserted into the charge plays a vital role in controlling the submerged arc furnace. Therefore, we used ultrasound waves reflected from the electrode tip to estimate the depth of electrodes inserted into the charge. However, grap...
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Abhishek Gautam, Alper Celik and Mahdi Azarpeyvand
The use of acoustic liners, based on double-degree-of-freedom Helmholtz resonators, for low-frequency-noise attenuation is limited by the volume of individual resonating cavities. This study investigates the effect of the septum neck length on the acoust...
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Daniel Deery, Lara Flanagan, Gordon O?Brien, Henry J. Rice and John Kennedy
Significant potential for acoustic metamaterials to provide a breakthrough in sound attenuation has been unlocked in recent times due to advancements in additive manufacturing techniques. These materials allow the targeting of specific frequencies for so...
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Zhenhua Hou, Qigan Wang, Shiqiang Zhang, Tengfei Si, Tiange Li and Zhijun Zhang
The exhaust tailpipe of a certain type of tractor was improved from the perspective of bionics, and bionic triangular convex texture was added to the inner surface of the exhaust tailpipe. The bionic tailpipe was proposed to improve noise reduction perfo...
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Alexis Caron-Rousseau, Pierre Blanchet and Louis Gosselin
While externally insulated wall assemblies are widely recognized for their hygrothermal performance, few research projects have focused on the impact of shifting the entire wall insulation to the exterior side of a structural cavity in cold or subarctic ...
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Brandon M. Lee, Jay R. Johnson and David R. Dowling
Computational predictions of acoustic transmission loss (TL) in ocean environments depend on the relevant environmental characteristics, such as the sound speed field, bathymetry, and seabed properties. When databases are used to obtain estimates of thes...
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Giovanni Fasulo, Pasquale Vitiello, Luigi Federico and Roberto Citarella
The purpose of this work is to characterise the vibro-acoustic behaviour of rectangular flat panels reinforced by ?unconventional? stiffeners. Such panels are being increasingly employed in the aircraft industry in the case of composite fuselage, so that...
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Abhishek Gautam, Alper Celik and Mahdi Azarpeyvand
This study investigates the acoustic performance of a system of two Helmholtz resonators experimentally and numerically. The distance between the Helmholtz resonators was varied to assess its effect on the acoustic performance of the system quantitativel...
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Yaxi Peng, Apostolos Tsouvalas, Tasos Stampoultzoglou and Andrei Metrikine
Underwater noise pollution generated by offshore pile driving has raised serious concerns over the ecological impact on marine life. To comply with the strict governmental regulations on the threshold levels of underwater noise, bubble curtains are usual...
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Jiaqi Liu, Shengchun Piao, Minghui Zhang, Shizhao Zhang, Junyuan Guo and Lijia Gong
Oceanic fronts involved by ocean currents led to strong gradients of temperature, density and salinity, which have significant effects on underwater sound propagation. This paper focuses on the impact of the oceanic front on three-dimensional underwater ...
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