FIG. 1. Comparison of measured and modeled A-weighted SPL at a position 290m from a wind turbine in a wind turbine facility. On the right hand side are shown the A weighted overall SPL and A-weighted overall SPL with an upper limiting frequency (ULF) of 1 kHz. Black bars and dashed black line: measured energy average SPL at 0m receptor height with 1 SD error bars; open squares: Swedish method; open triangles: Harmonoise SPL at 4m height; open red circles and red dashed line: ISO (1996) at 4m height; filled red circles: ISO (1996) at 0m height