Results 31 to 40 of about 44,520 (308)
Instrument self-noise and sensor misalignment [PDF]
Advances in Geosciences, 2013 In this study we investigate self-noise of RefTekTM 151-60A "Observer" broadband seismometers (flat to velocity between 50 Hz down to T0=60 s, f0≈17 mHz) using the coherency analysis method introduced by Sleeman et al. (2006).
A. Gerner, G. Bokelmann
doaj +1 more source
Frontiers in Energy Research, 2022 This paper presents a detailed investigation about the modal coherence characteristics of turbomachinery noise. The modal coherence characteristics of ducted noise at high frequencies are investigated by establishing three kinds of ducted sound source ...
Kunbo Xu +3 more
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3D Computation of Broadband Slat Noise from Swept and Unswept High-Lift Wing Sections
, 2011 In previous work a RANS based simulation technique for the simulation of broadband slat noise was established. Good agreement was found between predicted and measured slat noise spectra.
Appel, Christina +11 more
core +1 more source
Slat Noise Prediction using Discontinuous Galerkin Method and Stochastic Turbulent Sound Source
, 2010 A promising way to predict airframe noise is the numerical solution of the Acoustic Perturbation Equations (APE) with the help of the Discontinuous Galerkin Method (DGM) and the Fast Random Particle Mesh (FRPM) method.
Marcus Bauer +3 more
core +1 more source
Frontiers in Ecology and EvolutionAlthough plants and microorganisms can respond to sound (mainly single frequency bands), the effects of anthropogenic noise—particularly broadband traffic noise—remain largely unexplored, especially when plants and soil microbial communities are ...
Valentina Zaffaroni-Caorsi +7 more
doaj +1 more source
Turbulence-airfoil interaction noise reduction using wavy leading edge: an experimental and numerical study [PDF]
, 2011 International audiencePassive treatments aiming at reducing turbofan broadband noise have been recently studied in the framework of European Project FLOCON.
Clair, Vincent +3 more
core +2 more sources
A spatial correlation model for broadband surface noise [PDF]
The Journal of the Acoustical Society of America, 2020 The spatial correlation function for broadband ocean surface noise is considered in horizontally stratified media. It is expressed as an integral over the correlation function of the sound field radiated by a single noise source in the waveguide, assuming spatially uncorrelated noise sources with the same intensity that are distributed on the sea ...
Chao Ren, Yiwang Huang
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
Intensity discrimination and loudness for tones in broadband noise [PDF]
Perception & Psychophysics, 1990 In two previous papers (Parker & Schneider, 1980; Schneider & Parker, 1987), we developed a model, based on Fechner's assumption, which successfully predicted the relationship between loudness and intensity discrimination for tones presented in quiet and in notched noise.
B A, Schneider, S, Parker
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From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices
Advanced Engineering Materials, EarlyView.Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle +3 more
wiley +1 more source