Difference between using 2 and 4 meter receiver height in railway noise prediction

Abstract

In the Nordic countries a receiver height of 2 m has often been used when calculating noise levels over large areas for socioacoustic surveys, but within the EU 4 m is used. Here results are presented for railway noise calculations at both heights in 1459 points across several areas in Sweden. The average difference in equivalent level is 2.5 dB higher at 4 m height than at 2 m, which in turn leads to 10 % \u96 40 % less predicted annoyance if the exposure is calculated at 4 m