Yesterday it sounded like we were being attacked by a Stuka dive bomber.
During WW II the German Luftwaffe Junkers JU-87 (Stuka) had a propeller device mounted under each wing which put out a high pitch scream when dive bombing.
The intent was to scare the living bejesus out of anyone they were attacking. Along with the roar of the 1200 hp engine, it was a frightening sound. All one of the troops on the ground had to do was shout, "STUKA" and everyone knew what was coming next.
A number of modern movies have inserted the sound when planes are crashing. The Stuka was a one-of-a-kind and wrongly imitated by movie producers.
Even though it was a loud roar yesterday, it wasn't even close to a Stuka. It was a crop duster buzzing within yards of our rooftop spraying the nice neighbor farmer's corn with insecticide.