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Walls

Sound insulation

Sound insulation is a building element’s ability to reduce the transfer of noise from one space to another, through the air or through the structure.

Also known as acoustic insulation, soundproofing, airborne sound insulation, impact sound, acoustic wall

Airborne sound, such as voices or music, is reduced by mass, airtightness and separated layers; impact sound, such as footsteps on a floor, by resilient layers and decoupled structures. Requirements are highest between apartments.

Lightweight timber walls achieve good sound insulation by combining heavy boards, absorbent insulation in the cavity and double or staggered stud frames that break the path for vibrations.

Related terms
Partition wallA partition wall divides the space inside a building; it may be load-bearing or not, and is usually a stud frame boarded on both sides. Mineral woolMineral wool is insulation made from glass or stone fibres, sold as batts, rolls or loose fill and used to fill the cavities between studs and joists. Gypsum boardGypsum board (plasterboard, drywall) is a sheet of gypsum plaster between paper or fibre facings, used for interior linings and fire protection.
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