Assessing environmental noise impact of PA systems with the swept-sine method. A case study in the heritage site of the Alhambra

Abstract

Open-air spectacles near populated areas can cause noise issues. Sound engineers need an estimation of the limits at their mixing desk to avoid noise regulation infringements in places that can be far away. The Swept Sine Method is well known to set up sound systems among other uses but has never been used to assess long distance noise levels. This technique allowed a quick estimation in a neighbourhood with noise complaints caused by a theatre located on the other side of a valley. Traditional methods like sound level meter measurements failed as background noise was higher than the levels to be measured. This method can be applied to any situation where the noise source is electroacoustic.