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What altitude does sound become invisible?
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<blockquote data-quote="Multikoe" data-source="post: 79323" data-attributes="member: 12927"><p>There are so many factors to be considered here that it is impossible to answer. </p><p>In very quiet conditions, with no wind, no traffic and nothing to block the path of the sound, you probably can hear your drone from hundreds of meters up. Close to a freeway or the sea or with wind blowing through trees, you will not hear your drone if it is more than 10 meters up.</p></blockquote><p></p>
[QUOTE="Multikoe, post: 79323, member: 12927"] There are so many factors to be considered here that it is impossible to answer. In very quiet conditions, with no wind, no traffic and nothing to block the path of the sound, you probably can hear your drone from hundreds of meters up. Close to a freeway or the sea or with wind blowing through trees, you will not hear your drone if it is more than 10 meters up. [/QUOTE]
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What altitude does sound become invisible?