1 Scope
This document specifies the laboratory method for measuring the airborne sound insulation
performance of road traffic noise reducing devices in reverberant conditions. It covers the assessment of the intrinsic performance
of barriers that can reasonably be assembled inside the testing facility described
in EN ISO 10140‑2 and EN ISO 10140‑4.
This method is not intended for the determination of the intrinsic characteristics
of airborne sound insulation of noise reducing devices to be installed on roads in non-reverberant conditions.