Results 11 to 20 of about 128,951 (314)

Corn plants as temporary acoustic barrier to limit the effects of noise pollution

open access: yes, 2021
Corn is a cereal imported into Europe from the Americas. It is used for human and animal feed, but there are also industrial uses such as the production of ethanol, of fuel for heating homes, or the production of starch. Corn grows in the summer in areas
Ciaburro G.   +2 more
core   +1 more source

An Experimental Model for Extraction of the Natural Frequencies influencing on the Acoustic Noise of Synchronous Motors [PDF]

open access: yesمجله مدل سازی در مهندسی, 2018
Acoustic noise analysis of electrical machines is of special interest due to their numerous and miscellaneous applications. The analytical and numerical approaches for prediction and calculation of acoustic noise radiated from electrical machines usually
Mohammadreza Baghayipour   +2 more
doaj   +1 more source

A Method of Ultrasonic Finger Gesture Recognition Based on the Micro-Doppler Effect

open access: yesApplied Sciences, 2019
With the popularity of small-screen smart mobile devices, gestures as a new type of human–computer interaction are highly demanded. Furthermore, finger gestures are more familiar to people in controlling devices.
Qinglin Zeng   +3 more
doaj   +1 more source

Research of acoustic characteristics of experimental samples of acoustic liners for gas turbine engines7

open access: yesАвіаційно-космічна техніка та технологія, 2022
It is shown that the problem of aviation noise affecting the population near airports is still relevant. Pollution from aircraft noise is not a less influential factor than air or water pollution.
Yevhen Rymarenko
doaj   +1 more source

Research and optimization of acoustic environment in ordinary classrooms of middle school [PDF]

open access: yesE3S Web of Conferences, 2022
A good classroom acoustic environment will contribute to teachers’ health and students’ learning. Comfortable acoustic environment requires suitable reverberation time, sufficient loudness, uniform sound field distribution, high language clarity, and no ...
Li Shangzhi   +4 more
doaj   +1 more source

Active and Passive acoustic logging applied to the detection of preferential flow in a sedimentary aquifer

open access: yesScience and Technology for Energy Transition, 2023
Two boreholes of an experimental site located in the Cher region (France) were investigated via Full Waveform Acoustic Logging (FWAL). The acoustic tool used for the FWAL experiments is a flexible monopole tool holding two pairs of piezoelectric ...
Mari Jean Luc   +3 more
doaj   +1 more source

Numerical simulation and experimental validation of characteristics of jet noise from submerged axisymmetric nozzle

open access: yesZhongguo Jianchuan Yanjiu, 2017
[Objectives] In order to study the underwater jet noise characteristics,[Methods] the Lighthill acoustic analogy is carried out to compute the underwater free jet flow sound field characteristic of axisymmetric nozzle, with applying of FLUENT simulation ...
XING Junhua   +3 more
doaj   +1 more source

CURRENT STATE OF THE PROBLEM OF THE DEVELOPMENT OF ACOUSTIC LINERS FOR GAS-TURBINE ENGINES

open access: yesАвіаційно-космічна техніка та технологія, 2020
A review of current international aviation noise requirements is provided. It is shown that international requirements for aircraft noise levels are constantly increasing.
Євген Олександрович Римаренко
doaj   +1 more source

Numerical Simulation Study of Aerodynamic Noise in High-Rise Buildings

open access: yesApplied Sciences, 2022
In order to study the aerodynamic noise on the surfaces of high-rise buildings under the action of strong winds, this paper numerically simulated the sound pressure field on the surface of a high-rise building using the large-eddy simulation method ...
Zhengnong Li, Jianan Li
doaj   +1 more source

Vessel noise affects beaked whale behavior : results of a dedicated acoustic response study [PDF]

open access: yes, 2012
© The Author(s), 2012. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in PLoS ONE 7 (2012): e42535, doi:10.1371/journal.pone.0042535.Some beaked whale species are ...
Quick, Nicola   +30 more
core   +1 more source

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