Hello, not sure if this is the right area, but I figured that if anyone could answer my question you guys could.
At RDU you can get a really good view of planes landing because the streets run right next to one side of the runway (23 right), so I enjoy going out there and watching the commercial airliners land. Sometimes, usually when it’s a larger plane (737 or MD80), about 10 seconds after it flies overhead, you’ll hear what sounds like the echo of a whipping or whooshing sound overhead for a few seconds. I know it’s not from the actual airplane/airport, so I was wondering if someone could tell me what this is called and/or point me in the direction of something that explains what causes it? You might say I’m curious.