Results 281 to 290 of about 3,088,219 (346)

Sound Absorption in Electrolytes

The Journal of the Acoustical Society of America, 1965
Further ultrasonic-absorption measurements have been made at 104–108 cps in a number of electrolytes including iodides, chlorides, acetates, acetic acid, and mixtures of electrolytes. A number of these electrolytes exhibit interesting relaxation effects, which have been interpreted quantitatively in terms of specific ion-ion and ion-solvent ...
LeRoy Jackopin, John Stuehr, Ernest Yeager   +2 more
openaire   +1 more source

Ceramics sound absorption material

The Journal of the Acoustical Society of America, 2003
A ceramics sound absorption material made of a ceramics block which is obtained by adding a combustible pore-forming material to at least one selected from refractory clay and refractory chamotte and calcining the blend, which has communicating pores having a main pore diameter of 0.2 to 2,000 μm, which has an air permeability of at least 1 cm3·cm/cm2 ...
Hidenao Kawasaki, Osamu Kawasaki
openaire   +1 more source

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

Ceramic Material for Sound Absorption

Noise & Vibration Worldwide, 2015
The acoustic correction of large places for low frequency components can be obtained by inserting acoustic resonators. This paper reports the realization and the experimental verification of acoustic resonators obtained with ceramic material. The sound absorption is obtained by drilling the specimens of ceramic material with a hole size of 2 mm and 5 ...
openaire   +2 more sources

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. 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 polyimide composite aerogels for ancient architectures’ protection

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

Sound absorptive multilayer composite

The Journal of the Acoustical Society of America, 2008
A sound absorptive multilayer composite having an air-impermeable barrier, an air-permeable reinforcing core having an airflow resistance of at least about 100 mks Rayls and a thickness at least about ⅓ the final composite thickness, an air-permeable open cell foam or fibrous pad having an airflow resistance less than about 2000 mks Rayls and a ...
Delton R. Thompson, Xiaohe Liu
openaire   +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   +1 more source

Foam material sound absorption

The Journal of the Acoustical Society of America, 1986
The present invention relates to a sound absorbing member comprising a fiber grid insert disposed between and bonded to two open cell foam panels.
Werner Frank, Josef F. Irregeher
openaire   +1 more source

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.
James H. Batchelder, William S. Thayer, Theodore J. Schultz   +2 more
openaire   +1 more source