Results 61 to 70 of about 2,768,062 (267)
Advances in Mechanical Engineering, 2015 Porous metal materials are widely used in noise control with high sound pressure applications such as aircraft engine liners and combustion chambers for rocket engines due to their excellent performance of sound absorption characteristics and ...
Xiaopeng Wang +3 more
doaj +1 more source
Nonlinear generation of sound waves in the pre-galactic epoch and 21 cm absorption [PDF]
arXiv, 2023 The structure of the sound waves generated in baryonic gas during the evolution of dark matter halos with masses less than the Jeans mass is calculated. In this case, the source of the gravitational field that creates the wave can be either at a linear stage (an evolving perturbation in dark matter) or at a nonlinear stage (detached and virialized ...
arxiv
Holzforschung, 2021 In this study, the sound absorption coefficient of three low density hardwoods – binuang, balsa and paulownia – were investigated. Their gas permeability and pore size were measured, and their pore shapes were classified into through pore, blind pored ...
E. Jang, C. Kang
semanticscholar +1 more source
Theory of amplification of sound (acoustic phonons) by absorption of laser radiation in quantum wires with parabolic potential [PDF]
arXiv, 2002 Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of a laser radiation in quantum wires with parabolic potential is calculated for the case of monophoton absorption and the case of multiphoton absorption.
arxiv
Acoustic properties of glubam and SPF [PDF]
arXiv, 2022 Noise pollution has attracted a wide attention due to its negative effect on human health, and many researchers are working on proposing strategies or developing new materials to improve acoustic performance of structures and building materials. Meanwhile, the worldwide emphasis on sustainable development has motivated the development and application ...
arxiv
Optimised Sound Absorbing Trim Panels for the Reduction of Aircraft Cabin Noise [PDF]
, 2004 The EU project FACE (Friendly Aircraft Cabin Environment) aims to improve the environmental comfort in aircraft cabins. As part of this project, this paper focuses on the reduction of noise in aircraft cabins.
Boer, A. de +2 more
core +1 more source
Journal of Low Frequency Noise, Vibration and Active Control, 2017 In industrial and architectural applications, noise can be controlled using sound-absorbing materials. Natural materials are now gaining importance in the noise control engineering as they have advantages like low cost, eco-friendly, easy to produce, etc.
Pritesh V Bansod +2 more
doaj +1 more source
On the amplification of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires [PDF]
arXiv, 2002 Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires is calculated for the case of monophoton absorption process and the case of multiphoton absorption process.
arxiv
Investigation On The Role of Cavity and Slit of Cavity Resonators to Sound Absorption Behavior [PDF]
, 2011 Slit resonator and also perforated resonator are few kind of room interior finishing. They act as sound absorbers. Gen-erally, they are constructed of at least three basic types of absorbers, such as porous, membrane and cavity compo-nents.These types of
Kristanto, Luciana, Susilo, Nugroho
core
Acoustical properties of double porosity granular materials [PDF]
, 2011 Granular materials have been conventionally used for acoustic treatment due to their sound absorptive and sound insulating properties. An emerging field is the study of the acoustical properties of multiscale porous materials.
Umnova, O, Venegas, R
core +1 more source