In order to improve a wind tunnel nozzle for a wind tunnel, in particular a vehicle wind tunnel, which defines a flow direction, with an inner nozzle wall and a nozzle exit edge, further comprising means for breaking up coherent vortex structures of a free jet issuing from the wind tunnel nozzle, for performing aeroacoustic measurements; It is proposed that the device comprises at least one arranged on the inner nozzle wall or trained, extending in the flow direction Strahlleitelement having a projecting from the nozzle wall or with respect to this recessed and facing away from this guide surface. Furthermore, an improved wind tunnel is proposed.
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