S-shaped dependence of the sound pressure level in outdoor propagation on the effective sound speed gradient

Open Access

Table 1

Comparison of the (average) meteorological data of Bad Voeslau and Aderklaa.

	Effective sound speed gradient < 0				Effective sound speed gradient > 0
	Range	Average	Wind speed^a	Upwind^b wind speed	Range	Average	Wind speed^a	Downwind^b wind speed
	1/s	1/s	m/s	m/s	1/s	1/s	m/s	m/s
Bad Voeslau	Up to −0.6	−0.20	3.0	−2.3	Up to +0.5	0.19	2.5	1.8
Aderklaa	Up to −0.2	−0.12	3.1	−1.4	Up to +0.3	0.16	2.4	0.2

Arithmetic average wind speed.

Averaged wind speed component perpendicular to traffic line source in case of upwind/downwind conditions.

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