NEN EN ISO 140-4 : 1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
02-27-2014
01-12-2013
Defines field procedures for measurement of the airborne sound insulation properties of interior walls, floors and doors between them under diffuse sound field conditions in both rooms, and for determination of the protection shown to the occupants of the building. Provides values for airborne sound insulation which are frequency dependent, and can be converted into a single number, characterizing the acoustic performance, by applying ISO 717-1.
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