Simulation of blowing wind created by mouthing wind sounds into the mic, then processing with large-room reverb. Recorded with a rode nt1a condenser mic.
A fan blowing, set to the highest setting. There's a strong low end presence, interestingly. The recording was made from behind the fan so the air wouldn't blow into the mic directly. Recorded with a zoom h1.
24-bit wav. Recorded with tascam dr-44wl on a windy day in my backyard. Hiding behind a fence using a hat as a wind shield. Stereo widening using hard pan and 5ms delay (so the first impulse of the sound is a bit weird).