BS 5821-3:1984

Действует

Methods for rating the sound insulation in buildings and of building elements, Method for rating the airborne sound insulation of fa$1Cade elements and fa$1Cades — 12 стр.

Описание Изменения Ссылки Версии

ICS

91.120.20 Acoustics in building. Sound insulation / Акустика в зданиях. Звукоизоляция