单词 | sonic velocity |
释义 | > as lemmassonic velocity sonic velocity n. the velocity at which sound waves travel in a particular medium, esp. air; cf. sonic speed n.Chiefly in scientific and technical use. ΘΚΠ the world > physical sensation > hearing and noise > thing heard > [noun] > sound > sonic speed sonic speed1939 sonic velocity1942 1942 Jrnl. Royal Aeronaut. Soc. 46 64 The local ‘sonic velocity’ a is then defined by the expression:—a2 = dp/dρ. 1962 Rep. Progress Physics 25 329 Increasing the length of interacting region will give a deceleration down to the sonic velocity. 2005 C. R. Branan Rules Thumb Chem. Engineers (ed. 4) i. 3/2 For the situations covered here, compressible fluids might reach sonic velocity. < as lemmas |
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