Acoustic barriers based on periodic arrays of scatterers

摘要: It is well known that certain periodic structures built by repetition of elements produce sound attenuation effects as a consequence the destructive interference scattered waves these elements. The results we got from transmission experiments with kind structures, so-called sonic crystals (SCs), led us to think SCs could be used an acoustic barrier. Until now, most arrays scatterers have been performed under controlled conditions, so how they would behave outdoors still not known. In this letter present outdoor-experimental for two-dimensional and it can concluded are suitable device reduce noise in free-field conditions.