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What altitude does sound become invisible?
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<blockquote data-quote="droffarc" data-source="post: 85686" data-attributes="member: 13145"><p>Don't be silly, I have never seen a visible sound! But would love to.</p><p>I have however seen photos of aircraft breaking the sound barrier.</p><p></p><p>So if you are totally deaf you will not hear a sound, I find that my spark's sound gets softer from about 5 meters up and gradually diminishes the higher it goes but at 40 meters I can still make it out if all other sounds are quiet, but in a noisy area.... nada!</p></blockquote><p></p>
[QUOTE="droffarc, post: 85686, member: 13145"] Don't be silly, I have never seen a visible sound! But would love to. I have however seen photos of aircraft breaking the sound barrier. So if you are totally deaf you will not hear a sound, I find that my spark's sound gets softer from about 5 meters up and gradually diminishes the higher it goes but at 40 meters I can still make it out if all other sounds are quiet, but in a noisy area.... nada! [/QUOTE]
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What altitude does sound become invisible?