Lexicon Overview
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Sound waves
Sound waves are mechanical vibrations propagating in liquids, gases and solid bodies and transporting the sound energy emitted by the sound source.
Sound insulation
Sound insulation is the acoustic shielding of a room or device in order to prevent or reduce the transmission of air-borne or solid-borne sound to neighboring spaces. The aim is to prevent the sound from propagating by using sound insulation materials to build a sound barrier around the noise source.
Reflection
When sound waves strike a smooth and hard surface, they are reflected (redirected). Soft, open-cell surface materials (e.g. foams) reflect a much lower proportion of the sound waves, but absorb the sound energy instead.
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Sound insulation
Sound insulation is the acoustic shielding of a room or device in order to prevent or reduce the transmission of air-borne or solid-borne sound to neighboring spaces. The aim is to prevent the sound from propagating by using sound insulation materials to build a sound barrier around the noise source.
Closed-cell foams
In closed-cell foams, the walls between the individual cells are completely closed. As this prevents the penetration of liquids and vapor etc., closed-cell foams are suitable for use also in spaces with increased moisture load.
Solid-borne sound attenuation/damping
Solid-borne sound attenuation is the absorption of solid-borne noise by a layer of suitable material, e.g. heavy foil, on the parts/elements where the solid-borne sound propagates. Solid-borne sound attenuation prevents the conversion of solid-borne sound into air-borne sound. For this purpose, the medium’s surface is covered with a homogeneous layer of acoustic material (adhesive fixation or other) that transforms sound energy into other energy forms.