Psychoacoustic investigations on the efficiency of different noise barriers

In addition to conventional noise barriers along rail tracks new innovative noise barriers can be applied, as for example a low noise barrier which is mounted without any further groundwork upon the sleepers. The advantage of this so called mini noise barrier is besides a much easier approval procedure the fact that it can be mounted, in case of double-track lines, also in between the two tracks. Calculated predictions of the noise reduction at various scenarios have just been presented at the Daga 2016.In the present study the predicted level differences at the point of immission are used as digital filters on recordings of train passes. In this manner different noise barrier scenarios are simulated and subjective evaluations are performed to receive data about the actual effect of different noise protection measures for the residents. The differences between the standardized calculation methods for traffic noise in dB(A) will be compared to the psychoacoustic results.