Supplementary Elements of Traffic Noise Barriers

Abstract

Depending on the acoustic, aesthetic, and other needs, additional objects are often incorporated into traffic noise barriers, such as caps to cover the top of the barrier, emergency openings, drainage openings, wall-mounted attachments, barrier protection from traffic, vertical supports for climbing plants, sound absorbers, protective caps for posts, and similar. The most common are the caps that are installed to improve the acoustic performance of the barrier, such as: • noise resonators, • tubular absorbers, • diffraction edge, • devices for passive phase interference, • devices for active noise control, etc.