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      CommentAuthorTrim
    • CommentTimeMay 3rd 2011
     
    • CommentAuthorjoshs
    • CommentTimeMay 3rd 2011
     
    It sounds like circular polarization.
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      CommentAuthorTrim
    • CommentTimeApr 20th 2019
     
    It's a one-way street for sound waves in this new technology.

    https://phys.org/news/2019-04-one-way-street-technology.html
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    If you raise the sixth note of a minor scale by one half-step you get the Dorian mode.