Effect of slit-shaped leaks on sound insulation of noise barriers

none2The airborne sound insulation performance of noise barriers can be adversely affected by sound leaks. The most common of them are slit-shaped apertures occurring between panels or panels ad posts. In this work, the effect of slit-shaped apertures is experimentally investigated using in an improved way the test method specified in CEN/TS 1793-5. The performance of the same noise barrier is tested in controlled conditions in the free field with and without an artificial sound leak. The effects of such sound leaks on the airborne sound insulation performance are measured at various distances and for different slit widths; the results are presented and commented.openGarai M.; Guidorzi P.Garai M.; Guidorzi P