Results 21 to 30 of about 242,471 (263)

Extrapolation of rotating sound fields [PDF]

The Journal of the Acoustical Society of America, 2018
A method is presented for the computation of the acoustic field around a tonal circular source, such as a rotor or propeller, based on an exact formulation which is valid in the near and far fields. The only input data required are the pressure field sampled on a cylindrical surface surrounding the source, with no requirement for acoustic velocity or ...
openaire   +2 more sources

Particle Image Velocimetry and Proper Orthogonal Decomposition Applied to Aerodynamic Sound Source Region Visualization in Organ Flue Pipe

Archives of Acoustics, 2015
The paper presents experimental results of the visualization of the nonlinear aeroacoustic sound generation phenomena occurring in organ flue pipe. The phase-locked particle image velocimetry technique is applied to visualize the mixed velocity field in ...
Witold MICKIEWICZ
doaj   +1 more source

MONITORING-CONTROL OF NOISE HAZARD OF THE ENVIRONMENT

Наука и инновации в медицине, 2018
Aim - justification of the method of monitoring the noise hazard of the environment. Objects and methods. A residential area with installed equipment to assess noise hazard; determination of the spectral composition of real noise. Results.
EL L Ovchinnikov, SS S Yashin, TI I Minaeva   +2 more
doaj   +1 more source

A System for Acoustic Field Measurement Employing Cartesian Robot

Metrology and Measurement Systems, 2016
A system setup for measurements of acoustic field, together with the results of 3D visualisations of acoustic energy flow are presented in the paper. Spatial sampling of the field is performed by a Cartesian robot.
Szczodrak Maciej, Kurowski Adam, Kotus Józef, Czyżewski Andrzej, Kostek Bożena   +4 more
doaj   +1 more source

Towards predicting immersion in surround sound music reproduction from sound field features

Acta Acustica, 2023
When evaluating surround sound loudspeaker reproduction, perceptual effects are commonly analyzed in relationship to different loudspeaker configurations.
Kiyan Roman, Bergner Jakob, Preihs Stephan, Wycisk Yves, Schössow Daphne, Sander Kilian, Peissig Jürgen, Kopiez Reinhard   +7 more
doaj   +1 more source

Inversion of spinning sound fields [PDF]

The Journal of the Acoustical Society of America, 2009
A method is presented for the reconstruction of rotating monopole source distributions using acoustic pressures measured on a sideline parallel to the source axis. The method requires no a priori assumptions about the source other than that its strength at the frequency of interest varies sinusoidally in azimuth on the source disk so that the radiated ...
openaire   +4 more sources

Ultrasonic Lateral Displacement Sensor for Health Monitoring in Seismically Isolated Buildings

Sensors, 2015
An ultrasonic lateral displacement sensor utilizing air-coupled ultrasound transducers is proposed. The normally-distributed far field of an ultrasound transducer in a lateral direction is taken advantage of for measuring lateral displacement.
Iwao Matsuya, Fumiya Matsumoto, Ikuo Ihara   +2 more
doaj   +1 more source

The Formation of 2D Holograms of a Noise Source and Bearing Estimation by a Vector Scalar Receiver in the High-Frequency Band

Journal of Marine Science and Engineering
The holographic signal-processing method for a single vector scalar receiver (VSR) in the high-frequency band in shallow water is developed in the paper. The aim of this paper is to present the results of the theoretical analysis, numerical modeling, and
Sergey Pereselkov, Venedikt Kuz’kin, Matthias Ehrhardt, Yurii Matvienko, Sergey Tkachenko, Pavel Rybyanets   +5 more
doaj   +1 more source

Numerical Simulation on Aerodynamic Noise of (K)TS Control Valves in Natural Gas Transmission and Distribution Stations in Southwest China

Energies
Fluid dynamic noise produced by eddy disturbances and friction along pipe walls poses a significant challenge in natural gas transmission and distribution stations.
Xiaobo Feng, Lu Yu, Hui Cao, Ling Zhang, Yizhi Pei, Jingchen Wu, Wenhao Yang, Junmin Gao   +7 more
doaj   +1 more source

Pathways and pitfalls: a qualitative study of student experiences in biomedical science education

FEBS Open Bio, EarlyView.
Biomedical science students from underrepresented backgrounds face barriers including financial strain, disrupted laboratory access and cultural exclusion. Peer networks provide vital support when institutional systems are difficult to navigate. To create inclusive learning environments and achieve academic success, educators should blend active, hands‐
Olivia J. Russell, Cassy Ross, Panagiota S. Filippou, Bruno Silvester Lopes, Dominic Gilchrist, Paul Dean, Kamar Ameen‐Ali, Tora K. Smulders‐Srinivasan, Ahmad A. Khundakar   +8 more
wiley   +1 more source