infrasonic

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Related to subsonic: subsonic speed

infrasonic

 [in″frah-son´ik]
below the frequency range of sound waves.

in·fra·son·ic

(in'fră-son'ik),
Denoting those frequencies that lie below the range of human hearing.
Synonym(s): subsonic
[infra- + L. sonus, sound]

infrasonic

/in·fra·son·ic/ (-son´ik) below the frequency range of sound waves.

in·fra·son·ic

(in'fră-son'ik)
Denoting those frequencies that lie below the range of human hearing.
[infra- + L. sonus, sound]

infrasonic

below the frequency range of sound waves.
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References in periodicals archive ?
The nine-inch shortie only generated 842 fps with the subsonic load, but they still arrive at 100 yards with some 825 fps left.
The differences between the SubSonic 1 and 5 are few indeed.
A high velocity blower circulates the air at subsonic speed, providing a wind chill factor effect resulting in exceptional heat transfer rates, according to the company.
01pm for the 3,658 mile crossing which is scheduled to take 3 hrs 49 mins - four hours less than by subsonic jet.
Exhaust gases from subsonic jet aircraft are affecting the ozone layer, the troposphere and cloud cover over the Northern Hemisphere every minute of every day as hundreds of heavy jets fly back and forth through the North Atlantic Flight Corridor and over the continental US.
The thermoplastic becomes molten and is projected at subsonic speeds against the surface being coated.
The A10 and most close-support aircraft designed by other nations are cheap primarily because they are subsonic.
The target system will be provided as the international variant of the recently selected next generation high subsonic sub-scale aerial target system for the US Navy.
Contract notice: Changing the air generation system of the subsonic wind tunnel acoustic center.
ATAC flies subsonic and supersonic fighter aircraft to provide Navy airborne training services from four primary locations in the continental US, Hawaii and Japan.
Since 1958, Lockheed Martin and its heritage companies have used the High Speed Wind Tunnel (HSWT) in Grand Prairie, Texas, for subsonic, transonic and supersonic research-and-development testing.
300 AAC rounds can be readily had in both supersonic and subsonic loadings.