Boys With Toys

Look at this doohickey.

This invention relates to the modulating of signals on carriers, which are transmitted and the signals intelligibly recovered, and more particularly, to the modulation of speech on a carrier and the intelligible recover of the speech by means of the Radio Frequency Hearing Effect.

The Radio Frequency (“RF”) Hearing Effect was first noticed during World War II as a subjective “click” produced by a pulsed radar signal when the transmitted power is above a “threshold” level. Below the threshold level, the click cannot be heard.

Hm. Wonder if you could convince some young woman (or her friends) that she was schizophrenic with one of these. Been around since the 70s in Patent form, though speech might not have possible then.

Essentially it’s a transmitter that requires little to nothing to receive messages.

Here’s more about the phenomenon on Wikipedia. Have a look at some of the patents based on it.


Quoting from the above source, “Microwave hearing may be useful to provide a disruptive condition to a person not aware of the technology. Not only might it be disruptive to the sense of hearing, it could be psychologically devastating if one suddenly heard “voices within one’s head”.


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