|
|
|
|
|
Jukka Tanttari and Antti Hynninen
Marine propulsors represent one of the most important contributors among anthropogenic sounds radiated into water. Blade based propulsors, e.g., propellers, generate tones at the blade passing frequency and its harmonics, especially in cavitating conditi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Vadim Palchikovskiy, Igor Khramtsov and Oleg Kustov
This article considers the influence of the orifice arrangement in a cover of a cylindrical resonator on the impedance determined by the Dean?s method. A resonator with a small height and a low perforation degree is studied. This geometry provides differ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Huang Huang, Mingming Yang and Dingxi Wang
Flutter was encountered at part speeds in a scaled wide chord fan blisk designed for a civil aeroengine during a rig test when the fan bypass flow was throttled toward its stall boundary. Analysis of the blade tip timing measurement data revealed that th...
ver más
|
|
|
|
|
|
|
|
|
|
|
Izaz Ali, Hassan Khan, Rasool Shah, Dumitru Baleanu, Poom Kumam and Muhammad Arif
In the present research work, a newly developed technique which is known as variational homotopy perturbation transform method is implemented to solve fractional-order acoustic wave equations. The basic idea behind the present research work is to extend ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Mathew G. Pelletier, Greg A. Holt and John D. Wanjura
Accepted acoustic testing standards are available; however, they require specialized hardware and software that are typically out of reach economically to the occasional practitioner. What is needed is a simple and inexpensive screening method that can p...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andreas Wurzinger, Florian Kraxberger, Paul Maurerlehner, Bernhard Mayr-Mittermüller, Peter Rucz, Harald Sima, Manfred Kaltenbacher and Stefan Schoder
Acoustic emissions play a major role in the usability of many product categories. Therefore, mitigating the emitted sound directly at the source is paramount to improve usability and customer satisfaction. To reliably predict acoustic emissions, numerica...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yadong Zhang and Yijun Liu
A new approach to accelerating the evaluation of monopole and dipole source integrals via the fast multipole method (FMM) in the time domain for general three-dimensional (3-D) aeroacoustic problems is presented in this paper. In this approach, the aeroa...
ver más
|
|
|
|
|
|
|
|
|
|
|
Filippo De Girolamo, Lorenzo Tieghi, Giovanni Delibra, Valerio Francesco Barnabei and Alessandro Corsini
Wind turbines play a major role in the European Green Deal for clean energy transition. Noise is a critical aspect among open technological issues, as it determines the possibility of onshore installations near inhabited places and the possible detriment...
ver más
|
|
|
|
|
|
|
|
|
|
|
Mami Shiraishi, Katsuaki Mishima, Masahiro Takekawa, Masaaki Mori and Hirotsugu Umeda
This study aimed to establish and verify the validity of an acoustic simulation method during sustained phonation of the Japanese vowels /i/ and /u/. The study participants were six healthy adults. First, vocal tract models were constructed based on comp...
ver más
|
|
|
|
|
|
|
|
|
|
|
Zhen Lu, Tohru Mukai, Yasuzumi Fujimori and Kohji Iida
The authors have developed a method to estimate the catch efficiency of sampling gear using acoustic information. Since different sampling conditions will cause different sampling results, it is necessary to know more details about catch efficiency to qu...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xing Zhao, Xiaoyang Jia, Lin Li and Hanyu Wang
In this paper, we aim to address the challenge of airflow interference during fault detection in high-speed train bogies by introducing a flow field and investigating the characteristics of the sound field distribution of critical components under its in...
ver más
|
|
|
|
|
|
|
|
|
|
|
Sunyoung Oh, Kyoung-Yeon Kim, Hyun-Joo Oh, Geunchang Park, Wooseok Oh and Kyounghoon Lee
In this study, the distribution of giant N. jellyfish by the echo counting method was investigated in the East China Sea, where giant N. jellyfish are known to breed and migrate to the coastal waters of Korea mainly in summer. In addition, the distributi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ali Karimpour, Salam Rahmatalla and Casey Harwood
This article presents a new analysis to determine the variation in modal dynamic characteristics of bridge superstructures caused by hydrodynamic added mass (HAM) during progressive flooding. The natural frequency variations were numerically and experime...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yuyao Liu, Zhou Meng, Wen Chen, Yan Liang, Wei Chen and Yu Chen
As one of the widespread physical phenomena in the global ocean system, the ocean front has a very important influence on underwater sound propagation. Firstly, this paper systematically reviews several methods for the detection of ocean fronts in the pa...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shunichi Mukae, Takeshi Okuzono and Kimihiro Sakagami
Partition of unity finite element method with plane wave enrichment (PW-FEM) uses a shape function with a set of plane waves propagating in various directions. For room acoustic simulations in a frequency domain, PW-FEM can be an efficient wave-based pre...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wei Liu, Lilun Zhang, Yongxian Wang, Xinghua Cheng and Wenbin Xiao
Acoustic particle velocities can provide additional energy flow information of the sound field; thus, the vector acoustic model is attracting increasing attention. In the current study, a vector wavenumber integration (VWI) model was established to provi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Marta Solé, José-Manuel Fortuño, Mike van der Schaar and Michel André
Global change is the origin of increased occurrence of disturbance events in natural communities, with biological invasions constituting a major threat to ecosystem integrity and functioning. The apple snail (Pomacea maculata) is a freshwater gastropod m...
ver más
|
|
|
|
|
|
|
|
|
|
|
Gioia Fusaro, Xiang Yu, Zhenbo Lu, Fangsen Cui and Jian Kang
A new AMM window simultaneously allows a tunable dual performance of natural ventilation and noise mitigation.
|
|
|
|
|
|
|
|
|
|
|
Fanxizi Liu, Qiang Gao, Hui Guo, Chenhong Lang, Jinhua Jiang and Yiping Qiu
To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum-assi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Kilian Tschöke, Tobias Gaul, Alexander Pietzsch, Eberhard Schulze and Lars Schubert
Nowadays, fiber-reinforced plastics are found in numerous industrial applications, such as aerospace, automotive engineering, railway, and naval engineering. These materials have high tensile and flexural strengths and nevertheless a low density at the s...
ver más
|
|
|
|
|
|