I was going through some old papers on my desk and came across some information about how loud the interior of a jet engine gets. I just thought it might be neat to share. Of course, it is refered to as "being loud." That would be too simple. It is called "Sound Pressure" just so we can sound smart at our meetings. Technically, that is the accurate term, but pretense annoys me. At 140 dBs, titanium panels could fatigue and break because of the vibration. Sometimes, parts need to be modified for no other reason than the accoustic response. I think I will keep all my >100Hz sounds less than 100dBs. As for the jet engine frequencies, it is just a big jumble. Nothing really specific.