Results 21 to 30 of about 82,218 (265)

Acoustic scattering effect prediction of helicopter fuselage based on BEM and convective FW–H equation

Acta Acustica, 2022
The main acoustic noise source of helicopters is supposed to be the rotor blades, but the scattering effect of the helicopter fuselage sometimes cannot be ignored.
Wang Zeyang, Huang Jun, Yi Mingxu
doaj   +1 more source

Semi-Automated Classification of Side-Scan Sonar Data for Mapping Sabellaria spinulosa Reefs in the Brown Bank, Dutch Continental Shelf

Journal of Marine Science and Engineering
Biogenic reefs support marine biodiversity and play a key role in a healthy marine environment. Protecting and enhancing reef-building species, such as Sabellaria spinulosa, require mapping and monitoring strategies.
Timo Constantin Gaida, Bas Binnerts, Oscar Bos   +2 more
doaj   +1 more source

Noise maps for acoustically sensitive navigation [PDF]

SPIE Proceedings, 2004
More and more robotic applications are equipping robots with microphones to improve the sensory information available to them. However, in most applications the auditory task is very low-level, only processing data and providing auditory event information to higher-level navigation routines.
Martinson, Eric, Arkin, Ronald C.
openaire   +1 more source

Research on Thermal Dissipation Characteristics Based on the Physical Laws of Forced Vibration in Granular Assemblies

Applied Sciences
Particle damping technology is applied in vibration and noise reduction because of its good broadband vibration reduction effect. The energy transfer and loss between particles are keys to the role of damping.
Shengwu Zhang, Wei Xu, Chiming Wang, Yuanchao Zhang, Yanan Li, Jianwei Cheng   +5 more
doaj   +1 more source

A frequency-dependent acoustic diversity index: A revision to a classic acoustic index for soundscape ecological research

Ecological Indicators, 2023
In recent years, passive acoustic monitoring (PAM) has been widely applied in the field of soundscape ecology. Meanwhile, acoustic indices, as an important tool for rapid biodiversity assessment (RBA), have also attracted increasing attention.
Zhi-yong Xu, Lei Chen, Bryan C. Pijanowski, Zhao Zhao   +3 more
doaj   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Research on Loss Characteristics Based on the Vibration Law of Granular Assembly

Shock and Vibration
Particle damping technology is a typical passive vibration damping technology. In order to further explore the energy dissipation characteristics of particle dampers under different excitation, the relationship between internal vibration state and energy
Shengwu Zhang, Wei Xu, Chiming Wang, Yuanran Qiu, Yuanchao Zhang, Yanan Li, Yingjie Zhang   +6 more
doaj   +1 more source

Measurement and Characterization of Acoustic Noise in Water Pipeline Channels

IEEE Access, 2019
Measurement and characterization of acoustic noise in water pipeline systems across the 10 Hz to 100 kHz acoustic frequency band are reported in this paper.
Amartansh Dubey, Zhao Li, Pedro Lee, Ross Murch   +3 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Influence of recording devices and environmental noise on acoustic index scores: Implications for bird sound-based assessments

Ecological Indicators
Passive acoustic monitoring serves as a minimally invasive and effective method for biodiversity assessment, particularly in bird monitoring through the application of acoustic indices.
Chengyun Zhang, Yue Zhang, Xinjun Zheng, Xinghui Gao, Zezhou Hao   +4 more
doaj   +1 more source