JET ENGINE DECIBELS
As for your question which was not answered correctly: Jet engine decibels. At 200 feet, a jet engine "winding up" will register 140 plus DECIBELS.
As for not wearing your ear protection. With 1 hour of 90 decibels you can damage your hearing.
I worked on both Piston and Jets and and right underneath them. At the time the Air Force supplied no type of ear protection - not even ear plugs. Am now
the proud owner of two hearing aids, courtesy of the U.S. GOVERNMENT.