hypersonic frequency
1Hypersonic 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… …
2List of The King of Braves GaoGaiGar protagonists — This is an index of protagonist characters and robots in the anime and manga series The King of Braves GaoGaiGar and The King of Braves GaoGaiGar FINAL. Contents 1 Gutsy Geoid Guard/Gutsy Galaxy Guard 1.1 Guy Shishioh 1.1.1 Cyb …
3List of Marvel Comics Golden Age characters — The following in a list of the characters and teams that first appeared in Marvel Comics Golden Age (under both of Marvel s previous names, Timely Comics Atlas Comics). This literature related list is incomplete; you can help by expanding it.… …
4Sound from ultrasound — Contents 1 Parametric array 2 Applications 2.1 Commercial advertising …
5Non-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… …
6Psychoacoustics — 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… …
7Ultrasound — 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,… …
8Ayaks — 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 …
9Defence Research and Development Organisation — Sanskrit: बलस्य मूलं विज्ञानम् Strength s Origin is in Science [1] Agency overvi …
10Momentum exchange tether — Momentum Exchange Tethers is one of many applications for space tethers. This sub set represents an entire area of research using a spinning conductive and/or non conductive tether to throw spacecraft up or down in orbit (like a sling), thereby… …
