| 释义 |
ultrasonics, n. pl.|ʌltrəˈsɒnɪks|
[f. ultrasonic a.: see -ic 2.]
a. Ultrasonic waves; ultrasound.
1924Ann. Rep. Canadian Nat. Research Council 23 Ultra Sonics are sound vibrations of a pitch higher than those which are audible. 1931Nature 21 Feb. 284/2 Prof. F. L. Hopwood discussed ultra-sonics or inaudible sounds. 1957A. C. Clarke Deep Range i. 10 Sub 5 was still close enough to the mother ship for radio to work, but before long he'd have to switch to the ultrasonics. 1960New Biol. XXXI. 32 The bacteria which have been treated by ultrasonics..cannot multiply any more. 1972R. E. Ornstein Psychol. of Consciousness (1975) ii. 19 We normally consider that our senses are the ‘windows’ to the world... But such a view..is not entirely true, for a primary function of sensory systems taken as a whole is to discard ‘irrelevant’ information, such as X-rays, infrared radiation, or ultrasonics.
b. The branch of science and technology concerned with the study and use of ultrasonic waves. Const. as sing.
1940[see Asdic]. 1959Sunday Times 21 June 3/2 Ultrasonics has..been established for a number of years in submarine detection, underwater signalling, echo⁓sounding, fish location, flaw detection in metals and in many fields of industrial measurement and control. 1977Time 28 Nov. 56/2 Since the original development of the technique for cardiology in the 1950s, ultrasonics has been used to explore other areas of the body, notably, the developing fetus in the mother's uterus. |