Science: Jet Sound Effects

A touchy subject in aviation circles is the effect of jet engine noise on human nerves and bodies. Some of the airmen hate to mention it; they fear that people who live near jet bases will blame all sorts of ailments on the screaming jets. The truth about jets seems to be that their noise, when heard in the open and at a reasonable distance, is not at all harmful. But the intense "sound fields,"* which extend a short way behind the tail pipe, can have alarming and possibly harmful effects on people who...

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