NOISE BARRIER STRUCTURE WITH SOUND ABSORBING AND SOUND REDIRECTING PROPERTIES AND HIGH PERFORMANCE SOUND ABSORBER FOR USE IN SUCH STRUCTURE

摘要

A noise structure comprising a barrier made of a generally sound redirecting material defining a surface of the barrier and a plurality of sound absorbing boxes connected to this surface each box comprising a rear wall (4) and an extensively perforated front wall (2) said walls defining a longitudinal channel (5) at least partially occupied by a filling (6) made of a sound absorbing material in which the rear wall (4) is a substantially flat plane wall assembled parallel to and spaced apart from the surface of the barrier and is in its turn extensively perforated.