1, Feb 2024
Sound Absorbing Materials
Adding mass and density to the structure of any wall, floor or ceiling adds resistance to sound waves which in turn can reduce their energy. Adding absorbent materials such as concrete, wood or acoustic plaster can further assist with deflecting and dissipating reflected sound and also reducing reverberation.
Using sound absorbing materials in theatres, concert halls, offices and private homes prevents excess reverberation and can improve the overall ambience and comfort of the environment. All materials have some ability to absorb sound and the amount of sound absorbed is typically described as the material’s “sound absorption coefficient” for a given frequency range.
Exploring the Effectiveness of Sound Absorbing Materials
The acoustic performance of porous sound absorbers (such as acoustic foam) depends on the material thickness, porosity and the frequency of the incident sound wave. The material throat size determining the acoustic absorption frequency selectivity, the cell size and arrangement influencing the sound absorbing efficiency and the cross-section shape of the fibers allowing weight reduction can all have a significant effect on the overall sound absorbing performance.
Polyester fibre is a natural, nontoxic and very light weight material used in the manufacture of acoustic products such as acoustic insulation, wall and floor panels. It offers the ideal combination of heavy density and light weight and has superb acoustic properties including high sound absorption, high NRC rating (sound absorbing rating) and excellent vibrational damping. In addition, it is resistant to fire, abrasion, wrinkles, stretch and impact. It is especially effective at high frequencies where it provides the best acoustic performance.
- 0
- By saipanstewart