Figure 5
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Narrowband spectrum of the relative SPL ΔL calculated for the receiver upwind at xR = 500 m with (a) a grass ground in the summer and (b) grass ground in the winter (α = 0.3 used with Uref = 8 m/s at zref = 80 m. Solid line with no turbulence, dashed line with low turbulence and dotted line with strong turbulence).
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