Electrophonic sounds

From: Matson, Robert (ROBERT.D.MATSON@saic.com)
Date: Mon Jun 05 2000 - 13:24:46 PDT

  • Next message: Leo Barhorst: "Re: Question about stopwatches."

    > In my time as a meteor observer, I recall that some observers reported
    > hearing noises only a few seconds after the meteor burnup.  Obviously, it
    > could not be sound.  There is no definitive answer (NASA does zero
    > research in meteors.  It basically ignores the entire field.), but the
    > latest theory is an electrostatic event.
    
    I believe the term you mean is "electrophonic".  As you
    mentioned, bright bolides can produce electrophonic sounds
    that are more-or-less coincident with the meteor observation.
    The theory is that electromagnetic waves interact with metallic
    objects on the ground (near the observer) which then act as
    transducers.  Thus the end result is sound, but the sound
    waves have not had to travel very far.  --Rob
    
    
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