Results 331 to 340 of about 2,739,977 (397)

Labyrinthine acoustic metastructures enabling broadband sound absorption and ventilation

, 2020
There is growing interest in the development of path coiling-based labyrinthine acoustic metamaterials for realizing extraordinary acoustical properties such as low-to-mid frequency sound absorption.
Sanjay Kumar, H. Lee
semanticscholar   +1 more source

Sound Absorption in Hydrogen

The Journal of the Acoustical Society of America, 1958
Improved absorption results in hydrogen in the range 1 to 37 Mc/sec atmos are reported and their theoretical implications briefly reviewed.
H. D. Parbrook, W. Tempest
openaire   +2 more sources

The absorption of sound in emulsions

Acoustical Physics, 2010
The absorption of sound in homogeneous dilute emulsions due to the viscosity of the components of the medium is theoretically investigated. Deformation (capillary) oscillations of the emulsion droplets are taken into account. The viscous wavelength is assumed to be small compared to the droplet size, and the latter is assumed to be small compared to ...
openaire   +2 more sources

Sound Absorption of Draperies

The Journal of the Acoustical Society of America, 1967
Measurements were made of the acoustical absorption introduced by various configurations of draperies into a small reverberation room. The results are presented and compared here.
William S. Thayer, James H. Batchelder, Theodore J. Schultz   +2 more
openaire   +2 more sources

Absorption of sound by homogeneous turbulence

Journal of Fluid Mechanics, 1978
The following problem is treated: given a plane acoustic wave propagating through an unbounded field of turbulence, calculate the amount of acoustic energy converted into turbulent kinetic energy. The fluid velocities due to the acoustic waves and the turbulence are assumed to be small compared with the speed of sound.
D. T. Noir, Albert R. George
openaire   +2 more sources

Fatigue-resistant polyimide aerogels with hierarchical cellular structure for broadband frequency sound absorption and thermal insulation

Advanced Composites and Hybrid Materials, 2023
Xingyu Zhao, Kunpeng Ruan, Huaili Qiu, Xiao Zhong, Junwei Gu   +4 more
semanticscholar   +1 more source

A scalable high-porosity wood for sound absorption and thermal insulation

Nature Sustainability, 2023
Xinpeng Zhao, Yu Liu, Liuxian Zhao, Amirhossein Yazdkhasti, Yimin Mao, A. P. Siciliano, J. Dai, Shuangshuang Jing, Hua Xie, Zhihan Li, Shuaiming He, B. Clifford, Jianguo Li, Grace S. Chen, Emily Q. Wang, A. Desjarlais, D. Saloni, Miao Yu, J. Kośny, J. Zhu, Amy Gong, Liangbing Hu   +21 more
semanticscholar   +1 more source

Sound absorption structure

The Journal of the Acoustical Society of America, 1999
A sound absorption structure which is mainly applied to an intake system of an automotive engine for suppressing noise level. The sound absorption structure comprises a base duct portion, and an extended duct portion in which a sound absorption material is installed, and a Helmholtz resonator.
Kyoichi Watanabe, Kouichi Nemoto
openaire   +2 more sources

Sound absorption polyimide composite aerogels for ancient architectures’ protection

Advanced Composites and Hybrid Materials, 2023
Xingyu Zhao, Yujia Hu, Xiuqi Xu, Mukun Li, Yixin Han, Shan Huang   +5 more
semanticscholar   +1 more source

Absorption of sound in sea water

Ultrasonics, 1963
Laboratory and field data on the absorption of sound in sea- water are reviewed in the light of modern theory, including effects of pressure, temperature and salinity. The effects of temperature and MgSO4 salt concentration appear to be compatible from one investigator to another.
M. Schulkin, H.W. Marsh
openaire   +3 more sources