- hypersonic frequency
- гиперзвуковая частота
Англо-русский технический словарь.
Англо-русский технический словарь.
Hypersonic effect — The hypersonic effect is a term coined to describe the phenomenon reported in some scientific studies, which demonstrate that although humans cannot consciously hear sounds at frequencies above [approximately] 20 kHz, the presence or absence of… … Wikipedia
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Sound from ultrasound — Contents 1 Parametric array 2 Applications 2.1 Commercial advertising … Wikipedia
Non-rocket spacelaunch — Non rocket space launch (NRS) is a launch into space where some or all needed speed and altitude is provided by non rocket means, rather than simply using conventional chemical rockets from the ground. A number of alternatives to rockets have… … Wikipedia
Psychoacoustics — is the study of subjective human perception of sounds. Alternatively it can be described as the study of the psychological correlates of the physical parameters of acoustics. Background Hearing is not a purely mechanical phenomenon of wave… … Wikipedia
Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… … Wikipedia
Ayaks — The Ayaks ( ru. АЯКС, Ajax) is a hypersonic aircraft program started in the Soviet Union and currently under development in the Russian FederationPaul A. Czysz Future Spacecraft Propulsion Systems: Enabling Technologies for Space , Springer, 2006 … Wikipedia
Defence Research and Development Organisation — Sanskrit: बलस्य मूलं विज्ञानम् Strength s Origin is in Science [1] Agency overvi … Wikipedia
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Pulse detonation engine — A pulse detonation engine, or PDE , is a type of propulsion system that can operate from subsonic up to hypersonic speeds. In theory the PDE design can produce an engine with a burn efficiency higher than other designs, with considerably fewer… … Wikipedia