Results 171 to 180 of about 194,541 (227)
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, 2020
Porous ZrC ceramics with uniform pore distribution were successfully prepared using evaporating solvent and hot-pressing sintering. A sintering model of porous ZrC ceramics was established under applied sintering pressure to illustrate the formation ...
N. Yan +7 more
semanticscholar +1 more source
Porous ZrC ceramics with uniform pore distribution were successfully prepared using evaporating solvent and hot-pressing sintering. A sintering model of porous ZrC ceramics was established under applied sintering pressure to illustrate the formation ...
N. Yan +7 more
semanticscholar +1 more source
, 2020
The design of sound-absorbing wedges as the main elements used in anechoic rooms is of great importance. There are general standards for the design of an anechoic room and sound-absorbing wedges.
Mohammad Erfan Tavakkoli Nejad +2 more
semanticscholar +1 more source
The design of sound-absorbing wedges as the main elements used in anechoic rooms is of great importance. There are general standards for the design of an anechoic room and sound-absorbing wedges.
Mohammad Erfan Tavakkoli Nejad +2 more
semanticscholar +1 more source
, 2020
The internationally recognized procedure ISO 354:2003 for measuring sound absorption coefficients under diffuse field conditions is now under revision. The main reason for this revision is the limited reproducibility of absorption coefficients measured ...
C. Scrosati +20 more
semanticscholar +1 more source
The internationally recognized procedure ISO 354:2003 for measuring sound absorption coefficients under diffuse field conditions is now under revision. The main reason for this revision is the limited reproducibility of absorption coefficients measured ...
C. Scrosati +20 more
semanticscholar +1 more source
, 2020
The microperforated compressed porous metal panel (MCPMP) absorber was proposed to develop novel sound absorber with excellent sound absorption performance, fewer utilized materials, and more lightweight. Through treating the compressed porous metal with
H. Duan +6 more
semanticscholar +1 more source
The microperforated compressed porous metal panel (MCPMP) absorber was proposed to develop novel sound absorber with excellent sound absorption performance, fewer utilized materials, and more lightweight. Through treating the compressed porous metal with
H. Duan +6 more
semanticscholar +1 more source
, 2019
Sound absorbing materials for noise control are distinguished due to their high efficiency in sound absorption. However, many of these materials are of synthetic origin and cannot be disposed of as solid waste in nature or incinerated by industry ...
Claudia Cilene Bittencourt da Silva +3 more
semanticscholar +1 more source
Sound absorbing materials for noise control are distinguished due to their high efficiency in sound absorption. However, many of these materials are of synthetic origin and cannot be disposed of as solid waste in nature or incinerated by industry ...
Claudia Cilene Bittencourt da Silva +3 more
semanticscholar +1 more source
Sound Absorption Coefficients and Acoustic Impedance
The Journal of the Acoustical Society of America, 1941The relation between normal acoustic impedance and the various types of absorption coefficient has been discussed and specific formulas for the coefficients in terms of acoustic impedance have been published. Contours of constant absorption coefficient plotted as a function of the real and imaginary parts of acoustic impedance plotted on a linear scale
Richard L. Brown, Philip M. Morse
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Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
2008+12 more sources
Journal of Cleaner Production, 2018
In the context of an urban environment assaulted by noise from different sources, the possibility of using composite materials made of concrete and various materials considered as waste was investigated, for the purpose of using them in acoustic barriers.
I. Oancea +4 more
semanticscholar +1 more source
In the context of an urban environment assaulted by noise from different sources, the possibility of using composite materials made of concrete and various materials considered as waste was investigated, for the purpose of using them in acoustic barriers.
I. Oancea +4 more
semanticscholar +1 more source
A model for the sound absorption coefficient of multi-layered elastic micro-perforated plates
Journal of Sound and Vibration, 2018In this paper, a model for the sound absorption coefficient of multi-layered elastic micro-perforated plates (MPPs) in an impedance tube is developed using an analytical approach.
Hyun-Sil Kim +4 more
semanticscholar +1 more source
Measurement uncertainty of the sound absorption coefficient
The Journal of the Acoustical Society of America, 2008The standard ISO/IEC 17025:2005 on the competence of testing and calibration laboratories requires that these laboratories shall apply procedures for estimating the uncertainty of their measurement results. One of the possibility is to evaluate the budget of uncertainty, taking into account all components that contribute significant uncertainty to the ...
openaire +1 more source