What is a Good Sound Absorption Coefficient?
The absorption coefficient ranges between zero and one, one meaning no sound energy is reflected and the sound is either absorbed or transmitted. For example, an opened exterior window has the absorption coefficient of one because no sound returns to the room. An effective absorber will have a sound absorption coefficient greater than .75.
If there is an excessive reverberance absorbing material should be added to decrease it. Materials that are more porous, less smooth, of less weight, thicker porous material, mounted over an airspace, or of less mass where more energy converts to mechanical energy, have higher values of the absorption coefficient.
Noise absorption Coefficient
Sound Absorption Coefficient SAA = 0.98
SP Perforated Panel
Material Specification Fiberglass material density of not less than 48 Kilograms per cubic meter, with a thickness of 50 mm. Are Incombustible, non-flammable, absorb moisture less than1.5% by weight, not moldy or a nursery bacteria (ASTM C665).
Test standard ASTM C423-99a. External surface with black spunbond cloth and galvanized steel 0.7 mm. thick coating with powder coat,. Perforated hole size 2.5 mm. Pit size 5.0 mm. was placed in a 90 degree.
Features
The walls are perforated panel to be used for sound absorption. Installed in the room to reduce wall resonance. Have sound absorption properties in the wide frequency range. Easy installation and strength. Durable to be inserted, acids, alkalis, moisture, have a long lifetime and can be cleaned without affecting the properties of the wall.
advantages of the Fabric Acoustic Panel: 1.Stable product quality and zero complaints. 2.High temperature resistance, freeze-thaw resistance, and aging resistance; 3.Functional products with sound absorption, strong decorative; 4.Wide range of applications:suitable for both house and industry decoration; 5.High anti-collision coefficient and not easy to break; 6.Able to achieve full frequency sound absorption
Insulation
Insulation Materials
Insulation materials run the gamut from bulky fiber materials such as fiberglass, rockwool, cellulose, and natural fibers to rigid foam boards to sleek foils. Bulky materials resist conductive heat flow in a building cavity. Rigid foam boards trap air or another gas in their cells to resist conductive heat flow. Highly reflective foils in radiant barriers and reflective insulation systems reflect radiant heat away from living spaces
Preforated steel
Span-bon
Glass wool
Gpysum
galvanize steel
