Acoustic Barriers

An acoustic barrier may be an acoustic wall such as that close to a motorway designed to reduce noise propagation or a partition between two volumes/rooms to reduce noise transmission.

The acoustic performance of barriers come into play in many different systems:

There are a number of particular features that control the transmission loss performance of an acoustic partition:

A barrier that reduces the noise on one side, such as the interior of a building. These may be described by a transmission loss or sound transmission class.

Mass Law

A rule for estimating the transmission loss of a barrier in its mass controlled region. The rule states that transmission loss increases/decreases 6 dB for each doubling/halving of either frequency or barrier surface density.

See also: Barrier, Building Acoustics, Coincidence, Decibel, Double Acoustic Barrier, Flanking Sound Transmission, Holes in Acoustic Barriers, Room Acoustics, Single Acoustic Barrier, Sound Transmission Class, Sound Transmission Loss.

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Subjects: Architectural Acoustics Noise & Vibration