Results 261 to 270 of about 399,393 (305)
Some of the next articles are maybe not open access.
2019
The transmission of sound through walls and barriers is an extremely important topic for noise control engineers. In this chapter we examine the basic principles of how sound passes through walls. The primary physical characteristics that influence sound transmission through walls are studied, including the importance of mass and how the bending ...
openaire +1 more source
The transmission of sound through walls and barriers is an extremely important topic for noise control engineers. In this chapter we examine the basic principles of how sound passes through walls. The primary physical characteristics that influence sound transmission through walls are studied, including the importance of mass and how the bending ...
openaire +1 more source
Ventilation-louver sound transmission-loss test results
The Journal of the Acoustical Society of America, 1976Indoor machinery installations, air conditioning equipment, and transformer vaults may need louvers to permit required air flows. These louvers may be significant paths for sound that is radiated into the surrounding community. Previous investigators reported field measurements on metal louvers.
Allan M. Teplitzky, John P. Carlson
openaire +1 more source
Sound transmission loss across specially orthotropic laminates
Applied Acoustics, 2007This work studies the sound transmission loss across composite material in order to understand the sound-insulating capacity at various frequencies. A so-called specially orthotropic laminate was examined. The material properties in thickness direction are different from those in in-plane directions but it is isotropic in the laminating plane. Thus the
Lin, H. J., Wang, C. N., Guo, Y. M.
openaire +2 more sources
Effect of Humidity on Sound-Transmission Loss
The Journal of the Acoustical Society of America, 1965A test program was recently instituted by the United States Gypsum Company—Research Center, with the cooperation of the Riverbank Acoustical Laboratories, to determine the effect of ambient humidity on the sound-transmission loss of a double-leaf gypsum-board partition system. The results of this test series were quite explicit.
Allen H. Shiner, Maurice J. Marchello
openaire +1 more source
Sound transmission loss of tiled brick walls
Noise Control Engineering Journal, 2005Walls made from hollow bricks joined with mortared joints are often found in the construction of buildings. Brick walls are also used as noise barriers. Over time, mortared joints develop gaps and cracks that reduce the noise-reduction capability of a brick wall.
Antonio Uris +4 more
openaire +1 more source
Sound transmission loss of vacuum insulation panels
The Journal of the Acoustical Society of America, 2008The sound transmission loss of a variety of vacuum insulation panels (VIP) has been measured in the laboratory. Core materials of the VIP include silica, polyurethane, micro fleece, and glass fibers. Mass law behavior and minima due to bending-wave coincidence and thickness resonance have been observed.
openaire +1 more source
Sound transmission loss of honeycomb sandwich panels
Noise Control Engineering Journal, 2006Honeycomb sandwich panels used for commercial applications are typically stiff and lightweight. They are optimized for mechanical performance, but have poor acoustical performance. Transmission loss (TL) is one of the metrics used to assess the acoustical performance of honeycomb sandwich panels.
Shankar Rajaram +2 more
openaire +1 more source
Sound Transmission Loss of Sandwich Panels
2012The sound transmission loss characteristics of plywood based sandwich panels were investigated. Measurements were made of the sound transmission loss of a range of materials and used as a baseline for comparison while a sound transmission loss optimisation method was developed. A unique test rig was built and calibrated to determine selected mechanical
openaire +2 more sources
INTER-NOISE and NOISE-CON Congress and Conference Proceedings
The performance of building sound insulation is an important parameter for evaluating the quality of construction projects. So far, the sound insulation performance testing of building walls requires the installation of large-dimensioned wall samples in specialized sound insulation laboratories, which is time-consuming and costly. If small-dimensioned
Ziyang WANG +4 more
openaire +1 more source
The performance of building sound insulation is an important parameter for evaluating the quality of construction projects. So far, the sound insulation performance testing of building walls requires the installation of large-dimensioned wall samples in specialized sound insulation laboratories, which is time-consuming and costly. If small-dimensioned
Ziyang WANG +4 more
openaire +1 more source
Wall structure having enhanced sound transmission loss
The Journal of the Acoustical Society of America, 2000A permanent stud wall structure having improved sound transmission loss comprising two substantially parallel rows of spaced apart vertically extending support members secured at their ends to a base and header respectively by appropriate means and defining a stud cavity; said vertically extending support members being located in each of said rows such
Alain LeConte, Ronald Moulder
openaire +1 more source