“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
Click here to subscribe and get instant access to read this report.
Click here to check your existing subscription status.
Existing members, login below:
© 1998 - 2022 by Linda Moulton Howe.
All Rights Reserved.