Subsonic may refer to:
Motion through a medium
* Any speed lower than the
speed of sound
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elasticity (solid mechanics), elastic medium. More simply, the speed of sound is how fast vibrations travel. At , the speed of sound in a ...
within a sound-propagating medium
*
Subsonic aircraft
A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound (Mach 1). The term technically describes an aircraft that flies below its critical Mach number, typically around Mach 0.8. All current civil aircraft, including ...
, a flying machine that flies at air speeds lower than the speed of sound
*
Subsonic ammunition
Subsonic ammunition is ammunition designed to operate at velocities below the speed of sound (Mach 1), which at standard conditions is . This avoids the supersonic shockwave or "crack" of a supersonic bullet, which, particularly for suppressed f ...
, a type of bullet designed to avoid creating a loud shockwave when fired
*
Subsonic flight
Aerodynamics () is the study of the motion of air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dynamics and its subfield of gas dynamics, and is an important domain of ...
, an aircraft flight at air speeds lower than the speed of sound in air
*
Subsonic and transonic wind tunnel
Transonic wind tunnels, between , are designed on similar principles as subsonic tunnels but present additional challenges, primarily due to the reflection of shock waves from the walls of the test section. To mitigate this, perforated or slotted ...
s
Music
*
''Subsonic'' (album), a 2002 album by Vigleik Storaas Trio
*
''Subsonic'' (EP), a 2013 EP by Younha
* ''Subsonic'' album series:
** ''
Subsonic 2: Bass Terror'', a 1995 album by Bill Laswell and Nicholas Bullen
** ''
Subsonic 3: Skinner's Black Laboratories'', a 1995 album by Andy Hawkins and Justin Broadrick
*
Subsonic Music Festival, an annual electronic music festival in Monkerai, Australia
See also
*
Infrasound
Infrasound, sometimes referred to as low frequency sound or incorrectly subsonic (subsonic being a descriptor for "less than the speed of sound"), describes sound waves with a Audio frequency, frequency below the lower limit of human audibility ...
, sound at frequencies below the normal threshold of human hearing
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