| 释义 |
deˈtune, v.
[f. de- II. 1 + tune v.]
trans. a. To alter or adjust (an oscillatory system, as a resonant circuit or a microwave cavity) so that its resonant frequency no longer coincides with the frequency of some other oscillation with which it interacts. b. (See quot. 19631.) Hence deˈtuned ppl. a.; deˈtuning vbl. n.
1924S. R. Roget Dict. Electr. Terms 60/2 Detuning (or Mistuning), the alteration of the period of oscillation of a circuit from that of the waves being dealt with. 1958Oxf. Mail 23 Aug. 3/6 A new Hillman Husky powered by a detuned version of the overhead valve Minx engine. 1962Simpson & Richards Junction Transistors xiv. 358 Detuning also occurs in the external-gain control method described below. 1963R. F. Webb Motorists' Dict. 75 Detune, to deliberately tamper with an engine to reduce its performance or efficiency... A high-powered racing engine that has been slightly ‘detuned’ will stand up to normal wear and tear better than a fully tuned engine. Detuning consists normally of fitting lower compression pistons, etc. 1963G. Troup Masers & Lasers (ed. 2) vi. 105 Detuning the cavity centre pulls the oscillation frequency away from the molecular frequency. 1970Daily Tel. 17 June 13/5 The engine is a detuned version of Rover's aluminium, 3½ litre V8. |