- subsonic frequency
- infrasonic f.
Medical dictionary. 2011.
Medical dictionary. 2011.
Frequency response — is the measure of any system s spectrum response at the output to a signal of varying frequency (but constant amplitude) at its input. In the audible range it is usually referred to in connection with electronic amplifiers, microphones and… … Wikipedia
subsonic — adjective a) having a frequency too low to be audible b) less than the speed of sound (in the same medium, and at the same temperature and … Wiktionary
This Side of Paradise (Star Trek) — NOTOC ST episode name = This Side of Paradise Spock experiences love series = TOS ep num = 24 prod num = 025 remas. num = 40 date = March 2 1967 writer = D.C. Fontana story by D.C. Fontana Nathan Butler (pseudonym of Jerry Sohl) director = Ralph… … Wikipedia
Fear-Master — is a supervillain from the Freedom City campaign setting of the role playing game, Mutants and Masterminds . He is analogous to comicbook villains such as the Scarecrow or Mister Fear, though his appearance and methods are more like those of… … Wikipedia
Suppressor — Several firearms with detachable suppressors, from top to bottom: An Uzi, An AR 15 variant, A Heckler Koch USP Tactical, A Beretta 92FS, and a SIG Mosquito … Wikipedia
Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after … Wikipedia
Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… … Wikipedia
Brainwave synchronization — or brainwave entrainment, is any practice that aims to cause brainwave frequency to fall into step with a periodic stimulus having a frequency corresponding to the intended brain state (for example, to induce sleep). It depends upon a frequency… … Wikipedia
rocket and missile system — ▪ weapons system Introduction any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion. Rocket is a general term used broadly to describe a variety of jet propelled missiles… … Universalium
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