How effective are specialized acoustic barrier curtains at reducing court noise?

To satisfy municipal noise bylaws, parks and private clubs install exterior-grade acoustic barrier curtains (such as Acoustifence or Sound Fighter systems) directly onto perimeter fencing. These curtains are constructed from dense barium sulfate-loaded mass vinyl with reinforced polyester facing, weighing between 1.0 and 1.5 lbs per square foot (Sound Transmission Class STC 26-28). To be effective, the barrier must break the line-of-sight between the paddle impact height (approx. 3 feet) and the residential receptor's windows. A continuous 10-foot tall acoustic curtain reduces direct impulse sound by 10 to 15 dBA, which psychoacoustically halves the perceived noise level.