1. infrasonic - Adjective
2. infrasonic - Adjective Satellite
having frequencies below those of audible sound
Source: WordNetFrequencies and resolutions The frequencies of sonars range from infrasonic to above a megahertz. Source: Internet
Matterhorn The Matterhorn is a subwoofer model completed in March 2007 by Danley Sound Labs in Gainesville, Georgia after a U.S. military request for a loudspeaker that could project infrasonic waves over a distance. Source: Internet
On the other end of the spectrum, the lowest frequencies are known as the infrasonic range. Source: Internet
The acoustic frequencies used in sonar systems vary from very low ( infrasonic ) to extremely high ( ultrasonic ). Source: Internet