Is there such a thing as ABSOLUTE silence. On a windless night I was driving across the Libyan Desert and stopped my truck to 'hear' silence. It took about 40 minutes for my truck engine to cool down and stop hissing and banging. When it did I could still detect a very, very faint humming in my ears. Why??
2007-01-03 17:52:39 · 6 answers · asked by Buck 5 in Science & Mathematics ➔ Other - Science
Yes, the sound of your pulse. From a strictly scientific point of view, absolute silence in our atmosphere can never occur since sound is basically the movement of air molecules. The only way the complete cessation of air molecules can occur is at a temperature of absolute zero. The closest we could get to absolute silence would be in deep space, but even there of course you've got (..hopefully..) that pulse sound to deal with.
2007-01-03 18:05:44 · answer #1 · answered by Chug-a-Lug 7 · 1⤊ 0⤋
The sound you hear in a seashell is actually created within yourself. Your blood cells whizzing through your vessels, random noise in your neurons, your breathing, all contribute to the background noise in your ears.
http://en.wikipedia.org/wiki/Endaural_phenomena
2007-01-04 02:27:37 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
The sound is not from outside, but inside.
2007-01-04 02:01:43 · answer #3 · answered by apollo 2 · 0⤊ 0⤋
Either your neurons continuing to fire and/or the blood pumping through your head.
2007-01-04 02:00:24 · answer #4 · answered by Clown Knows 7 · 0⤊ 0⤋
You were experiencing spontaneous residual mind refresh.
2007-01-04 04:06:04 · answer #5 · answered by ideaquest 7 · 0⤊ 0⤋
Was it a tune we all know ? it's just air pressure on your head, or in my case a vacuum.
2007-01-04 02:03:22 · answer #6 · answered by Anonymous · 0⤊ 0⤋