EN ISO 140-4:1998 Acoustics - Measurement of Sound Insulation in Buildings and of Building Elements - Part 4: Field Measurements of Airborne Sound Insulation between Rooms ISO 140-4:1998 was changed to EN ISO 16283-1:2014 Acoustics - Field measurement of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation (ISO 16283-1:2014).
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