Results 261 to 270 of about 118,865 (295)

Energy-Efficient geopolymer wall panels: optimizing mechanical, thermal, and acoustic properties for sustainable construction. [PDF]

Sci Rep
Rathinavel N, Aleem A, Ismail M.
europepmc   +1 more source

New Challenges in Assessment of the Acoustic Properties of Coating Polymers. [PDF]

Polymers (Basel)
Stanciu MD, Guiman MV, Năstac SM.
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Sound Absorption Coefficients and Acoustic Impedance

The Journal of the Acoustical Society of America, 1941
The 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
openaire   +1 more source

Estimation of Sound absorption Coefficient from the Sound Power

International Journal of Emerging Trends in Engineering Research, 2022
Sound absorption measurements were carried out in the reverberant room in accordance with ISO354. The present paper gives an experimental technique to estimate the sound absorption coefficient of a material based on the sound power in the reverberation room according to ISO 3741. This is in order to be able to calculate the sound absorption coefficient
openaire   +1 more source

Sound Absorption Coefficients Natural Fibre Reinforced Composites

Advanced Materials Research, 2013
In this Investigation, the influence of two kind of polymers (Urea-formaldehyde and Polypropylene) mixed with natural fibre (Kenaf) were studied for their sound absorption coefficients. Four samples were made; Samples A1 and A2 are made of Kenaf core fibre with adhesive of high emission Urea-formaldehyde resin (HN 100) with 51.6 % solid content.
Jayamani, Elammaran, Hamdan, Sinin
openaire   +2 more sources

Sound Absorption Coefficients Determined by Acoustic Pulses

The Journal of the Acoustical Society of America, 1960
Earlier measurements on the sound absorption coefficient of acoustical materials using a pulse technique, and therefore allowing the measurements to be made in all ordinary laboratory, have been extended to take further account of the actual pulse shape. Apparatus has been constructed to give an indication of the average pressure of the acoustic pulse.
C. L. Rogers, R. B. Watson
openaire   +1 more source

Reverberation Measurements of Sound Absorption Coefficients

The Journal of the Acoustical Society of America, 1934
A comparison is made of the results of the measurement of the absorption coefficients of twenty-five commercial materials by the organ pipe and ear method with the results obtained by measuring the rates of decay by electrical means. A consistent variation in these results is shown, which can be explained by assuming a slight departure from linearity ...
openaire   +1 more source

Measurement uncertainty of the sound absorption coefficient

The Journal of the Acoustical Society of America, 2008
The 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

Sound absorption coefficient measurement for various building elements

The Journal of the Acoustical Society of America, 2023
The current sound absorption coefficient testing measurement method, ISO 354, primarily focuses on materials used for surface coverings or equivalent sound absorption objects. However, there are other building elements such as lightweight partition walls and windows that do not have solid structures behind them.
Yang Ki Oh, Min Woo Kang
openaire   +1 more source

Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method

2008
  +12 more sources