Lexicon Overview
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Sound pressure
Sound pressure p (an RMS value; unit: Pascal = Pa) is the local pressure deviation from the ambient pressure that sound waves cause in a compressible medium, for instance air.
Building acoustics
Building acoustics is the branch of acoustics that deals with the effects of structural conditions on sound propagation within buildings and between indoor spaces and the outside world.
Sound power
Sound power W equals the total sound energy emitted by a sound source in all directions.Noise control encompasses all measures that help reduce the transmission of sound between a sound source and a target zone or recipient.
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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.
Threshold of pain
The threshold of pain (or: pain threshold) is the sound pressure level above which people perceive a sound event as being painful. For most people, the acoustic threshold of pain lies between 120 dB and 140 dB.