In many living and residential situations, the original masonry and its clairaudience can only be reduced by a front building. With a facing shell, the propagation of sound waves and the membrane effect of the exit wall can be interrupted. The most important detail is the complete decoupling of the components.
Note direction of noise
A noise protection wall that is subsequently installed can have two tasks or combine both:
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1. Earn incoming noise from outside
2. Damping in the room noise
Sound waves continue through hard materials such as walls and cladding plates. The materials act like a membrane. A subsequent sound insulation must stop this function. In order to reduce the exit of sound waves from a room, in addition to interrupting the reflection is another acoustic agent. Here the sound waves are broken.
Membrane and reflection
The typical sound breaking effect is used in clay studios whose wall coverings do not only consist of dense insulation material, but have a "blunt " surface. In the impact of sound waves, for example, from a TV "The insulation swallows the insulation, since it is not thrown back and not reproducing. This absorbent effect can be used well when building a TV wall.
If noise from the outside is carried into a room and there is no access to the wall side with the noise source, the original wall and membrane will be "encapsulated" when you build the soundproof wall yourself. A facing shell is placed in front of the existing wall as an attached wall construction. In the resulting cavity, insulation material is attached or filled. Materials with a high bulk density are suitable as insulating materials.
Styrofoam insulation is possible, but it is not one of the most effective soundproofing materials. Pressed fibers achieve the highest insulation values. The effect of the subsequently built-in soundproofing wall can be enhanced by double-planking the shell.
The wall construction must not touch the original wall directly. Fastenings, connections and transitions must be provided with an elastic sound barrier. Special spring systems, known as adjusting swing bars, and insulating inserts made of textile or rubber-like materials fulfill this function.Tips & Tricks You should achieve between thirty and fifty decibels as a sound reduction index when installing sound insulation at a later date. With material thicknesses of around thirty centimeters, you can achieve this reduction value with correctly decoupled construction.