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]

in·fra·son·ic

(in'fră-son'ik)
Denoting those frequencies that lie below the range of human hearing.
[infra- + L. sonus, sound]
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References in periodicals archive ?
The initial offering, available from Wolf, is a 278-grain full-metal-jacket boattail subsonic. The projectile features a bimetal jacket with a lead core and is loaded into Berdan-primed steel cartridge cases.
Subsonic transonic submerged intake design for a cruise missile, Master Thesis, Middle East Technical University, Ankara, Turkey.
In my rifles, Subsonic Hollowpoint averaged 979 fps and 0.73 inch.
In addition to these loads, I also included one subsonic load from Engel Ballistic Research (EBR,) Inc.
The 135-grain subsonic went through the Ruger and the Nighthawk with and without the suppressor.
Musk described his open-sourced hyperloop system as a "cross between a Concorde, a railgun and an air hockey table" for combining subsonic speed and the levitating ability of air pressure.
INDIA successfully test- fired its long- range subsonic cruise missile ' Nirbhay' from a test range at Chandipur in Orissa on Friday.
Round about this time in the discussion, there comes the old nudge, nudge, wink, wink and the pearl of wisdom is dispensed that silencers don't work unless subsonic ammunition is being used.
AAC reports that when fed .300 AAC Blackout subsonic ammo, the 762-SDN-6 delivers a mere 126 dB.
The flight took just over four hours supersonic except subsonic over Indian airspace compared to seven hours plus flying in a Jumbo B747.
Advanced aircraft design; conceptual design, analysis, and optimization of subsonic civil airplanes.
AN historic subsonic jet is coming to Ireland to mark 60 years since it broke the air speed record.