- subsonic sound
- инфразвук
English-Russian dictionary of telecommunications and their abbreviations. A.V. Alexandrov.. 2004.
subsonic sound
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Subsonic — may refer to:*Any speed lower than the speed of sound within a sound propagating medium is called subsonic. **Aircraft flight at airspeeds lower than the speed of sound in air is subsonic flight.In computing *Subsonic, an open source object… … Wikipedia
Sound barrier (disambiguation) — Sound barrier may refer to:wqdnakldabzczncalkejfAS sjasbda *Sound barrier, the transition at transonic speeds from subsonic to supersonic travel, usually referring to flight. * The Sound Barrier , a British 1952 film directed by David Lean.… … Wikipedia
subsonic — ► ADJECTIVE ▪ relating to or flying at a speed or speeds less than that of sound … English terms dictionary
subsonic — [subsän′ik] adj. [ SUB + SONIC] 1. designating, of, or moving at a speed in a surrounding fluid less than that of sound in the same fluid 2. INFRASONIC … English World dictionary
Subsonic aircraft — A subsonic aircraft is a machine, such as an airplane, helicopter, glider or dirigible, that is capable of atmospheric flight and its speed is less than the speed of sound. A supersonic aircraft s overall speed may be less than the speed of sound … Wikipedia
sound barrier — 1. Also called sonic barrier, transonic barrier. (not in technical use) a hypothetical barrier to flight beyond the speed of sound, so postulated because aircraft undergo an abruptly increasing drag force induced by compression of the surrounding … Universalium
Subsonic and transonic wind tunnel — ubsonic tunnelLow speed wind tunnels are used for operations at very low mach number, with speeds in the test section up to 400 km/h ( 100 m/s, M = 0.3). They are of open return type ( losses. Open wind tunnelThe working principle is based on the … Wikipedia
Sound reinforcement system — A sound reinforcement system is an arrangement of microphones, electronic signal processors, amplifiers, and loudspeakers that makes live or pre recorded sounds usually music or speech louder, or that distributes the sound to a larger or more… … Wikipedia
Sound barrier — In aerodynamics, the sound barrier usually refers to the point at which an aircraft moves from transonic to supersonic speed. The term came into use during World War II when a number of aircraft started to encounter the effects of compressibility … Wikipedia
subsonic — [[t]sʌ̱bsɒ̱nɪk[/t]] ADJ: ADJ n Subsonic speeds or aeroplanes are very fast but slower than the speed of sound. This is 20,000 feet higher than most subsonic airliners … English dictionary
subsonic — adjective Etymology: International Scientific Vocabulary Date: 1937 1. of, relating to, or being a speed less than that of sound in air 2. moving, capable of moving, or utilizing air currents moving at a subsonic speed 3. infrasonic 1 •… … New Collegiate Dictionary
