hypersonicadj.

/hʌɪpəˈsɒnɪk/

Etymology: < hyper- prefix + sonic adj., after supersonic, ultrasonic.

1. Of, pertaining to, or designating sound waves or vibrations with a frequency greater than about 1000 million Hz. (Cf. ultrasonic adj.)

ΘΚΠ

the world > matter > physics > science of sound > vibration > [adjective] > beyond range

ultrasonic1923

hypersonic1937

1937 B. V. R. Rao in Nature 22 May 885/1 Spontaneously existing sound-waves of thermal origin of very high frequencies (‘hyper-sonic waves’).

1938 B. V. R. Rao in Proc. Indian Acad. Sci. A. VII. 163 It appears desirable to designate the portion of the acoustic spectrum having a frequency higher than a thousand mega-cycles per second as the ‘hyper-sonic’ region, while the ‘ultra-sonic’ region may be taken to extend from one to a thousand mega-cycles per second.

1948 Rep. Progress Physics 11 205 Workers in India particularly have used hypersonic to denote ultrasonic phenomena (of thermal origin) at frequencies of the order of 1000 Mc/sec. or higher.

1960 Physical Rev. 117 1248 The hypersonic absorption was studied for longitudinal and transverse waves at various frequencies up to 4000 Mc/s.

1963 J. Blitz Fund. Ultrasonics vi. 167 Bömmel and Dransfeld measured the attenuation of both longitudinal and shear waves in quartz at frequencies ranging from 1,000 to 4,000 Mc/s using a hypersonic technique.

1971 Nature 24 Sept. 238/2 Mechanical surface waves can now be generated up to 10 GHz. Mechanical waves of these frequencies (up to 100 GHz) are often termed hypersonic.

2. Involving, pertaining to, capable of, or designating speeds greater than about five times the speed of sound. (Cf. supersonic adj. and n.)

ΘΚΠ

the world > movement > rate of motion > [adjective] > greater or less than speed of sound

supersonic1932

subsonic1936

infrasonic1942

ultrasonic1942

hypersonic1946

transonic1946

1946 Jrnl. Math. & Physics 25 247 Hypersonic flows are flow fields where the fluid velocity is much larger than the velocity of propagation of small disturbances, the velocity of sound.

1958 Engineering 14 Mar. 347/2 Flow about bodies at subsonic, supersonic, and hypersonic speeds.

1958 Times 19 Dec. 11/7 Hypersonic travel is just possible in the foreseeable future.

1960 New Scientist 14 July 88/2 The hypersonic wind tunnel is almost more necessary than the supersonic... A tunnel capable of producing..air speeds between Mach 10 and Mach 27 (something near 18,000 m.p.h.) is now in daily use.

1960 Nature 6 Feb. 346/2 The transition from the supersonic to the hypersonic régime occurs at a Mach number of about 5, but all the characteristic features of the latter régime may only become well developed at a much higher Mach number of, say, 15.

1969 Courier Mail (Brisbane) 17 Apr. 2 The construction of a 500-seat hypersonic aircraft could cost as much as £4000 million.

This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2021).

单词	hypersonic
释义	hypersonicadj. /hʌɪpəˈsɒnɪk/ Etymology: < hyper- prefix + sonic adj., after supersonic, ultrasonic. 1. Of, pertaining to, or designating sound waves or vibrations with a frequency greater than about 1000 million Hz. (Cf. ultrasonic adj.) ΘΚΠ the world > matter > physics > science of sound > vibration > [adjective] > beyond range ultrasonic1923 hypersonic1937 1937 B. V. R. Rao in Nature 22 May 885/1 Spontaneously existing sound-waves of thermal origin of very high frequencies (‘hyper-sonic waves’). 1938 B. V. R. Rao in Proc. Indian Acad. Sci. A. VII. 163 It appears desirable to designate the portion of the acoustic spectrum having a frequency higher than a thousand mega-cycles per second as the ‘hyper-sonic’ region, while the ‘ultra-sonic’ region may be taken to extend from one to a thousand mega-cycles per second. 1948 Rep. Progress Physics 11 205 Workers in India particularly have used hypersonic to denote ultrasonic phenomena (of thermal origin) at frequencies of the order of 1000 Mc/sec. or higher. 1960 Physical Rev. 117 1248 The hypersonic absorption was studied for longitudinal and transverse waves at various frequencies up to 4000 Mc/s. 1963 J. Blitz Fund. Ultrasonics vi. 167 Bömmel and Dransfeld measured the attenuation of both longitudinal and shear waves in quartz at frequencies ranging from 1,000 to 4,000 Mc/s using a hypersonic technique. 1971 Nature 24 Sept. 238/2 Mechanical surface waves can now be generated up to 10 GHz. Mechanical waves of these frequencies (up to 100 GHz) are often termed hypersonic. 2. Involving, pertaining to, capable of, or designating speeds greater than about five times the speed of sound. (Cf. supersonic adj. and n.) ΘΚΠ the world > movement > rate of motion > [adjective] > greater or less than speed of sound supersonic1932 subsonic1936 infrasonic1942 ultrasonic1942 hypersonic1946 transonic1946 1946 Jrnl. Math. & Physics 25 247 Hypersonic flows are flow fields where the fluid velocity is much larger than the velocity of propagation of small disturbances, the velocity of sound. 1958 Engineering 14 Mar. 347/2 Flow about bodies at subsonic, supersonic, and hypersonic speeds. 1958 Times 19 Dec. 11/7 Hypersonic travel is just possible in the foreseeable future. 1960 New Scientist 14 July 88/2 The hypersonic wind tunnel is almost more necessary than the supersonic... A tunnel capable of producing..air speeds between Mach 10 and Mach 27 (something near 18,000 m.p.h.) is now in daily use. 1960 Nature 6 Feb. 346/2 The transition from the supersonic to the hypersonic régime occurs at a Mach number of about 5, but all the characteristic features of the latter régime may only become well developed at a much higher Mach number of, say, 15. 1969 Courier Mail (Brisbane) 17 Apr. 2 The construction of a 500-seat hypersonic aircraft could cost as much as £4000 million. This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2021). < adj.1937
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