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Information about soundproofing professional advice and sound insulation projects for isolated fonic.Proiecte for: house, villas, clubs, restaurants, discos, rooms auditii.Acustica studio newstudyhall recordings RT60 measurements, noise measurements.
Noise Reduction newstudyhall Coefficient NRC represents the absorption of a material is represented by a number. For example, a gypsum board 12.5 mm thick, mounted on a metal structure has a NRC of 0.05. 0 = 100% NRC NRC Reflection Absorption 1 = 100% soft materials such as acoustical newstudyhall foams, fiberglass, fabric, carpet, etc. have a higher NRC. Hard materials such as brick or plaster will have a smaller NRC. The NRC is an average of a material degree of absorption at 250,500,1000 and 2000 Hz. As NRC is higher the better is the absorption but poorer sound insulation.
Note: Absorption (good for acoustic rooms), reflection (good insulation) newstudyhall NRC is used to make a comparison between materials. For materials newstudyhall with an NRC near ideal is we take the coeficinet Absorption (a) which will be explained below
ound Absortion Coefficient (a) real coefficient of absorption of a material is dependent on the frequency and sound absorption is a certain octave or 1/3 octave. For example, a plasterboard wall of 12.5 mm mounted on the metal structure has an absorption coefficient of 0.29 at 125Hz. Considering acoustic materials are measured and tested in the same way, a comparison between the two absorption coefficients must be made by the frequency at which the two materials absorb bine.Deci, in conclusion, a material that has a higher absorption in a given band He will absorb more in the band, if you use a complex wall. Sound transmission class STC-This is a measure of how effective material to isolate the sound. Example: STC 28 Gypsum is tough materials will have high STC (brick, concrete, plaster, stone wall) soft materials will have low STC. In reality, any material filters out some of the sound running through it, but dense materials are much better at insulating newstudyhall than soft. And NRC and STC are needed to get an idea of what materials to use. Size of the largest, newstudyhall remains the TL. Sound Transmission Loss (STL or TL) (more commonly known in the EU as TL. Represents the amount of sound insulated by a material at a certain octave or third octava.Se measured in decibels dB. When calculating absorption and insulation by the three sizes (NRC, STC and TL) must take into account that the three sizes were obtained laborator.Pentru values to put into practice these values, the thickness and density of the materials to be used must be increased by a percentage of 20%. Ca an aside to what I wrote above, I put the following question: what material you see displayed on the label of these Marines? For an efficiency of 100% of the sound insulation has built a floating room (a room in a room). This camcorder mechanical decoupling walls are original walls.
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