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Acoustic Observatory - Low-Cost

  1. Aug 21, 2013 #1
    Acoustic Observatory -- Low-Cost

    Check out my Acoustic Observatory

    It uses well-known and obvious principles of operation to "see" thunder at great distances. It cost about $50 to build, including the red laser diode -- but not including the front surface mirror which has been lying around my "lab" since the late nineties. (It's a small unmounted mirror, 1" x 1"; I wouldn't have paid more than ~$20 for it.)

    My goal with this simple device was to "see" thunder from storms approaching from west of Washington, D.C. "See" the thunder, that is, before I could hear it, maybe hours before I could hear it.

    Also I wanted to "see" certain long-wave sounds called "microbaroms" that, according to the Wikipedia, are created by storms at sea. I hope, if hurricanes come up the east coast this fall, to see plausible signals of microbaroms, which supposedly travel thousands of miles.

    I'm posting this because the laser-and-mirror method of this Acoustic Observatory seems like a low-cost way to detect certain small signals. Seismic signals, for instance, very small ones as come from traffic a quarter-mile distant might be detectable. You can see a schematic diagram of a possible Seismic Observatory.
    Last edited by a moderator: Dec 31, 2013
  2. jcsd
  3. Aug 21, 2013 #2
    thats a pretty nice instrument , wonderful thing , but are there any other sources of microbaroms other than hurricanes ?
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