The irradiation of pulse-modulated microwave in the head induces audible sound. Allan H. Frey in Cornel University is the first American to publish on the microwave hearing effect in 1962.
Joseph Sharp and Mark Grove at Walter Reed Army Institute of Research applied the microwave hearing effect to develop a microwave transmitter for transmitting a private message directly into the brain without any receiver.
On December 6, 2006, Fort George G. Meade in the Department of Army declassified a report entitled "Bioeffects of Selected Non-Lethal Weapons" concerning communication with the microwave hearing effect.
In view of the foregoing, we request the military intelligence community to stop using any microwave weapon for transmitting private message by the microwave hearing effect.