Sound Transmission Loss Measurement Methods and Standards

Sound transmission loss (STL) characterises the acoustic insulation performance of building partitions, panels, and composite structures. Laboratory measurement to ISO 10140 series and field measurement to ISO 16283 series use different methodologies and produce results suitable for different applications.

• ISO 10140-2: Laboratory measurement of airborne sound insulation of building elements
• ISO 16283-1: Field measurement of airborne sound insulation in buildings
• Two-microphone impedance tube method for small sample transmission loss
• Single number ratings: Rw, STC, and their relationship to measured data