Path: utzoo!attcan!uunet!husc6!spdcc!bloom-beacon!mit-hermes.ai.mit.edu!jpexg
From: jpexg@mit-hermes.ai.mit.edu.AI.MIT.EDU (John Purbrick)
Newsgroups: sci.electronics
Subject: Whispering wires
Message-ID: <3025@mit-hermes.ai.mit.edu.AI.MIT.EDU>
Date: 24 Jun 88 01:44:35 GMT
Organization: MIT AI Lab, Cambridge, MA
Lines: 4

I was out in the country a few days ago and passed under some high-tension
wires. The power lines were emitting a sort of hissing, crackling sound,
with no detectable 60Hz component that I could hear. What causes this effect?
If it makes a difference, the weather that day was very hot and fairly humid.