Wind-borne pitch rises with velocity and with smaller obstruction size

Evidence

The frequency of vortex shedding depends on the airspeed and the size of the obstruction. Everyone has heard the shrieking of the wind through branches or past telephone wires and has noticed that the pitch goes up as the wind velocity increases. The pitch is higher for smaller objects. — Eric J. Heller, Why You Hear What You Hear- An…, 1286