Results 11 to 20 of about 82,218 (265)
Biotic sound SNR influence analysis on acoustic indices
Frontiers in Remote Sensing, 2023 In recent years, passive acoustic monitoring (PAM) has become increasingly popular. Many acoustic indices (AIs) have been proposed for rapid biodiversity assessment (RBA), however, most acoustic indices have been reported to be susceptible to abiotic ...
Lei Chen +3 more
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A Method of Ultrasonic Finger Gesture Recognition Based on the Micro-Doppler Effect
Applied 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
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Авіаційно-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
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Zhongguo 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
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Research and optimization of acoustic environment in ordinary classrooms of middle school [PDF]
E3S 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
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Science 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
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CURRENT STATE OF THE PROBLEM OF THE DEVELOPMENT OF ACOUSTIC LINERS FOR GAS-TURBINE ENGINES
Авіаційно-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
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Numerical Simulation Study of Aerodynamic Noise in High-Rise Buildings
Applied 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
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Defence Technology, 2020 Underwater acoustic signal processing is one of the research hotspots in underwater acoustics. Noise reduction of underwater acoustic signals is the key to underwater acoustic signal processing.
Yu-xing Li, Long Wang
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Research of multiplicative noise reduction method for acoustic emission signal
Gong-kuang zidonghua, 2014 Based on the features of acoustic emission signal, the paper researched noise reduction methods of adaptive filters and wavelet decomposition fit acoustic emission signal with multiplicative noise. It compared simulation results of noise reduction of the
MA Xiaoli +3 more
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