microwave auditory effect

Discussion in 'Wireless & RF Design' started by Hoge, Dec 29, 2010.

  1. Hoge

    Thread Starter New Member

    Dec 25, 2010
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  2. blueroomelectronics

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    Jul 22, 2007
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    Tinfoil Hat?
     
  3. Kermit2

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    Feb 5, 2010
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    It is accomplished by using two freqs. One transmitted clean, and the other is FM modulated with audio. Selecting the proper freq is essential to achieve demodulation within the audio hearing range. The point in space where the beams overlap will contain the demodulated audio freq as a seeming ghost voice. Something has to be receptive to the freq though. Proof that it works on humans is not certain, and differs according to which second hand sources you find. No first hand sources or results of experiments have ever been located by me.

    If the beams are narrow the effect can be confined to a very small space and just such an isolated audio field has been achieved using ultrasonics and directional speaker drivers ( just one person in a room would hear it ). It was automotive sound system design that brought it to market first.
     
    Last edited: Dec 29, 2010
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