1. Infrasonic frequency response measurements include earthquakes and electroencephalography ( brain waves ).2. Infrasonic frequencies range from 20 Hz down to 0.001 Hz.3. Infrasonic vocalizations have been recorded from captive elephants in many different situations.4. The mechanism of infrasonic call production in elephants has not been determined. 5. :Ultra-and infrasonic weapons also come close. 6. Ultrasonic and infrasonic refers to frequency of sound. 7. He addressed in particular aerodynamics, ablation, meteor acoustics and infrasonic meteor observations. 8. Theaters equipped for Megasound had an additional battery of speakers, consisting infrasonic rumble capability. 9. This shows that the receptors for infrasonic stimuli may be located in the inner ear. 10. The entire spectrum can be divided into three sections : audio, ultrasonic, and infrasonic .
