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possible to make directional infrasound from a small device?

Discussion in 'Electronic Design' started by Bob Fnord, Jan 12, 2011.

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  1. Bob Fnord

    Bob Fnord Guest

    Is it possible to produce infrasounds (in the 7 to 20 Hz
    range) with a small (coat pocket size) electronic device?
    For example, can a small speaker produce such low sounds?

    And if so, is it possible to use a reasonably small
    parabolic reflector to aim them?

    (I have a feeling the answer to both is no.)
  2. Sjouke Burry

    Sjouke Burry Guest

    Follow your feeling.
  3. It might be possible if high power compression (shock) waves were
    directed at 7 per second. But not sinusoid.

    Dirk - My new book - Transcendence UK - Occult Talk Show
  4. I think Bill Beatty at has a lot on that topic IIRC

    Dirk - My new book - Transcendence UK - Occult Talk Show
  5. Rich Grise

    Rich Grise Guest

    Why screw around with sound? Just check with your friendly local
    neighborhood Jihadist, and learn to make IEDs.

    Good Luck!
  6. hamilton

    hamilton Guest

  7. Ask your friends in the KOOK group, you KOOK bastard.
  8. Phased ultrasound arrays in air are quite do-able, and are in fact used
    in some types of non-lethal area denial weapons.

    BTW, air can support almost arbitrary pressures as long as they are not

    Dirk - My new book - Transcendence UK - Occult Talk Show
  9. Go away, you retarded KOOK bastard.
  10. Bob Fnord

    Bob Fnord Guest

    Not square waves from a small multivibrator either,
    I guess?
  11. Probably, since they approximate shock waves and have high frequency
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