Sound reduction by a T-profile noise barrier

Abstract

This paper presents a study of the sound field diffracted by a T-profile noise barrier. To estimate the sound pressure behind the T-profile noise barrier, a calculation model was proposed. To verify the calculation model, experiments were conducted indoors using a reduce-scale noise barrier and outdoors using a full-scale noise barrier. Using the calculation model, the characteristics of T-profile noise barriers for noise reduction were estimated, including the effect of an absorbent material on the cap of the barrier.