The effect of applying a Kutta-Joukowski condition at the edge of a semi-infinite plane which is generating noise in a turbulent fluid at low Mach numbers is examined. It is found that in some circumstances the noise is increased and the intensity of the distant sound field may depend upon the third power of a typical fluid velocity. When the sound field is convected the orders of magnitude of the acoustic far field are the same whether or not the Kutta-Joukowski condition is applied, provided that the point of observation is not near the wake. Near the wake there is an acoustic “surface” wave which is much stronger than the distant field elsewhere.