Pt. 2: Mysterious Brain Concussion Injuries in Cuban Embassy — Infrasound? Ultrasound? Microwaves?

“Human hearing range is 20 Hz to 20,000 Hz. Below 20 Hz down to 4 Hz is infrasound. Above 20,000 Hz is ultrasound. Infrasound is usually not perceived as a tonal sound, but rather as a pulsating sensation, pressure on the ears or chest. Ultrasound can cause ear pressure, headaches, nausea and fatigue. Microwaves  are electromagnetic waves with frequencies ranging from 300 MHz to 300 GHz.” - Assoc. of Veterans Administration Audiologists (AVAA), March 2010


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