Abstract
In building acoustics, two different problems usually arise. There is a need to comply with established sound insulation parameters, but there are also legislative conditions concerning reverberation time. It is therefore necessary to acoustically insulate and condition the enclosures. When designing the acoustic treatment of buildings, sound insulation is always considered before acoustic conditioning. There are multiple solutions for sound insulation; one of them consists of a base wall reinforced with a plasterboard lining. The sound insulation improvement provided by these solutions will depend on the type of base wall used. A common solution for acoustic conditioning is the use of perforated plate lining systems with a plenum filled with sound absorbing material. This work presents a solution for simultaneous sound insulation and conditioning improvement, reducing the installation costs. Materials that provide the acoustic conditioning features were analyzed to validate their use in the complete solution, performing airflow resistance tests. The complete solution was also evaluated on a laboratory scale by conducting tests in a reverberation chamber and in a transmission chamber for small samples. Finally, the effectiveness of the presented solution was assessed with in-situ tests in a radio studio.
Highlights
When acoustically designing a space, essentially, two requirements must be met to guarantee acoustic comfort; these are good sound insulation and controlled reverberation time
The proposed solution consists of a plasterboard lining system formed by a viscoelastic multilayer—composed multilayer—composed of of two layers of textile felt with the same density and thickness, thermally adhered to a high-density viscoelastic membrane forming forming aa sandwich—combined sandwich—combinedwith withperforated perforatedplasterboard
It has been proven that the combination of the viscoelastic multilayer with the perforated plates can be used for acoustic conditioning, yielding values over 0.5 for the sound absorption coefficient in all the interest range for building acoustics
Summary
When acoustically designing a space, essentially, two requirements must be met to guarantee acoustic comfort; these are good sound insulation and controlled reverberation time. The use of viscoelastic membranes is a common practice in sound tions [8,9], and their positive performance in these cases has already b Combining this material with a porous layer can provide excelle behavior. In buildings, this porous sound absorbing layer usually consists closure with perforated plasterboards over the textile felt layer should efficiently control. An example of using these resid strated Combining this material with a porous layer can provide excellent sound cations embracing circularity is their use in acoustic conditioning solu absorbing behavior. In buildings, this porous sound absorbing layer usually consists of fibers or foams.
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