low frequencyn.adj.

Brit.

/ləʊ ˈfriːkw(ə)nsi/, U.S.

/loʊ ˈfrikwənsi/

Origin: Formed within English, by compounding. Etymons: low adj., frequency n.

Etymology: < low adj. + frequency n. Compare high frequency n.

A. n.

1. A low rate of recurrence of any regularly repeated event, so that the interval between successive events is correspondingly large; (Telecommunications) the frequency of an electromagnetic wave or other oscillatory phenomenon having a relatively small number of cycles in a second; spec. a frequency of 30–300 kilohertz (abbreviated LF).

ΘΚΠ

the world > matter > physics > science of sound > vibration > [noun] > low frequency

low frequency1839

sub-bass1839

bass1930

the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > frequency > high or low frequency

low frequency1839

high frequency1842

society > communication > telecommunication > [noun] > signal > frequency or band of frequencies

high frequency1842

low frequency1900

voice frequency1905

audio frequency1913

pulsatance1919

medium frequency1920

side frequency1920

intermediate frequency1924

bass1930

frequency1943

frequency spectrum1955

the world > matter > physics > electromagnetic radiation > electricity > voltage > [noun] > having few cycles per second

low frequency1900

the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [noun] > rate of recurrence > unit of > as measured in

high frequency1842

low frequency1900

the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > frequency > specific frequencies

high frequency1842

natural frequency1873

resonant frequency1897

resonance frequency1898

low frequency1928

modulation frequency1930

quench frequency1938

gyrofrequency1941

Nyquist frequency1963

1839 Guy's Hosp. Rep. 4 71 In persons of weak constitution..the same low frequency of the pulse is often observed.

1884 W. A. Guy & J. Harley Hooper's Physician's Vade Mecum (ed. 10) iv. 169 The pulse of the one was never above 84, while the pulse of the other was counted as high as 180... The low frequency in the first case was thought to be due to the state of the brain.

1900 M. A. Oudin Standard Polyphase Apparatus & Syst. xiv. 242 Transmissions of power are accomplished at a comparatively low frequency.

1920 Whittaker's Electr. Engineer's Pocket-bk. (ed. 4) 348 The result..has been the adoption of two frequencies, a medium frequency for general power and lighting, and a low frequency for systems supplying rotary converters.

1928 Daily Mail 25 July 18/1 The best Gramophone and Wireless Sets at present in use fail to reproduce the low-frequency of bass notes in anything like proper proportion.

1943 F. E. Terman Radio Engineers' Handbk. v. 409 A power supply having low internal impedance at low frequencies is also helpful.

1954 Proc. IRE 42 1074/2 The output of this network is amplified, then passes through..a filter that rolls off the low frequencies.

2001 Sci. News 1 Sept. 134/3 Such devices use filters to convert the low frequency of the human voice into high-frequency waves.

2. A low rate of occurrence over a particular period of time or in a given sample.

ΘΚΠ

the world > time > frequency > infrequency > [noun]

rarenessa1530

rarity1542

seldomness1561

unfrequency1611

infrequence1644

infrequency1677

low frequency1899

1899 Jrnl. Royal Agric. Soc. Eng. 10 765 The deficiency [in rainy days]..being nearly as marked in districts..where the total quantity of rain was practically normal, as in other districts where..a low frequency might naturally have been expected.

1935 J. S. Huxley & A. C. Haddon We Europeans ix. 267 Our picture of the human species will be like a contour-map, a region of high frequency for, say, round-headedness being separated from another similar peak by a ‘valley’ of low frequency.

1977 Ann. Internal Med. 86 454/2 The relatively low frequency of severe reactions.

1999 J. M. Weiner & L. G. Lipson in C. J. Rosen et al. Aging Skeleton vi. 55 Hutchinson-Guilford..is an inherited disorder thought to be sporadic..in as much as it has a low frequency of recurrence in families.

B. adj. Usually hyphenated.

1. Characterized by a low frequency (sense A. 1); (of equipment) that operates at or deals with low frequencies.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [adjective] > of specific frequency

low frequency1873

high frequency1891

radio frequency1915

1873 U.S. Patent 139,459 3/2 A low frequency oscillatory current is set up.

1900 Engineering 28 Sept. 412/3 Low frequency induction telegraphy experiments..were not considered in this report.

1926 J. S. Huxley Ess. Pop. Sci. xvii. 191 The special sense-organs for perceiving low-frequency vibrations in water.

1934 B.B.C. Year-bk. 385 The output from the microphone is taken to a two-stage low-frequency amplifier.

1973 E. Boyd & R. Parkes Dark Number viii. 83 Some stimuli are so reverberant they just hum on as a low-frequency signal programmed into your unconscious.

1997 AOPA Pilot Nov. 54 (caption) The radio is just as it looked when new, although there are no longer many low-frequency navaids for it to tune.

2010 Nature 21 Oct. 927/2 A type of very low-frequency plasma wave called a chorus wave does the job.

2. That occurs relatively rarely. Also: characterized by a low rate of occurrence of something.

ΘΚΠ

the world > time > frequency > infrequency > [adjective]

seld1398

seldom1483

rare1565

secular1599

unfrequent1611

straggling1618

infrequent1622

unobvious1643

far-between1743

rarish1772

unwonted1785

sporadic1842

low frequency1946

1946 Classical Jrnl. 41 261/1 Already knowing..all the words, except those supplied immediately below the text (as being low-frequency non-memory words or forms).

1957 Publ. Amer. Dial. Soc. xxviii. 78 Low-frequency verbs like asseverate, reiterate, aver, etc.,..would rarely be initials without that, or parentheticals.

1971 Brit. Med. Bull. 27 19/1 Much of the risk to people from tribes where the frequency [of cancer of the penis] is high is lost when they move to low-frequency areas.

2011 Courier Mail (Austral.) (Nexis) 7 Feb. (Finance) 43 Catastrophes such as floods, cyclones and earthquakes are low frequency events but with massive correlated cost.

This entry has been updated (OED Third Edition, September 2013; most recently modified version published online March 2022).

单词	low frequency
释义	low frequencyn.adj. Brit. /ləʊ ˈfriːkw(ə)nsi/, U.S. /loʊ ˈfrikwənsi/ Origin: Formed within English, by compounding. Etymons: low adj., frequency n. Etymology: < low adj. + frequency n. Compare high frequency n. A. n. 1. A low rate of recurrence of any regularly repeated event, so that the interval between successive events is correspondingly large; (Telecommunications) the frequency of an electromagnetic wave or other oscillatory phenomenon having a relatively small number of cycles in a second; spec. a frequency of 30–300 kilohertz (abbreviated LF). ΘΚΠ the world > matter > physics > science of sound > vibration > [noun] > low frequency low frequency1839 sub-bass1839 bass1930 the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > frequency > high or low frequency low frequency1839 high frequency1842 society > communication > telecommunication > [noun] > signal > frequency or band of frequencies high frequency1842 low frequency1900 voice frequency1905 audio frequency1913 pulsatance1919 medium frequency1920 side frequency1920 intermediate frequency1924 bass1930 frequency1943 frequency spectrum1955 the world > matter > physics > electromagnetic radiation > electricity > voltage > [noun] > having few cycles per second low frequency1900 the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [noun] > rate of recurrence > unit of > as measured in high frequency1842 low frequency1900 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > frequency > specific frequencies high frequency1842 natural frequency1873 resonant frequency1897 resonance frequency1898 low frequency1928 modulation frequency1930 quench frequency1938 gyrofrequency1941 Nyquist frequency1963 1839 Guy's Hosp. Rep. 4 71 In persons of weak constitution..the same low frequency of the pulse is often observed. 1884 W. A. Guy & J. Harley Hooper's Physician's Vade Mecum (ed. 10) iv. 169 The pulse of the one was never above 84, while the pulse of the other was counted as high as 180... The low frequency in the first case was thought to be due to the state of the brain. 1900 M. A. Oudin Standard Polyphase Apparatus & Syst. xiv. 242 Transmissions of power are accomplished at a comparatively low frequency. 1920 Whittaker's Electr. Engineer's Pocket-bk. (ed. 4) 348 The result..has been the adoption of two frequencies, a medium frequency for general power and lighting, and a low frequency for systems supplying rotary converters. 1928 Daily Mail 25 July 18/1 The best Gramophone and Wireless Sets at present in use fail to reproduce the low-frequency of bass notes in anything like proper proportion. 1943 F. E. Terman Radio Engineers' Handbk. v. 409 A power supply having low internal impedance at low frequencies is also helpful. 1954 Proc. IRE 42 1074/2 The output of this network is amplified, then passes through..a filter that rolls off the low frequencies. 2001 Sci. News 1 Sept. 134/3 Such devices use filters to convert the low frequency of the human voice into high-frequency waves. 2. A low rate of occurrence over a particular period of time or in a given sample. ΘΚΠ the world > time > frequency > infrequency > [noun] rarenessa1530 rarity1542 seldomness1561 unfrequency1611 infrequence1644 infrequency1677 low frequency1899 1899 Jrnl. Royal Agric. Soc. Eng. 10 765 The deficiency [in rainy days]..being nearly as marked in districts..where the total quantity of rain was practically normal, as in other districts where..a low frequency might naturally have been expected. 1935 J. S. Huxley & A. C. Haddon We Europeans ix. 267 Our picture of the human species will be like a contour-map, a region of high frequency for, say, round-headedness being separated from another similar peak by a ‘valley’ of low frequency. 1977 Ann. Internal Med. 86 454/2 The relatively low frequency of severe reactions. 1999 J. M. Weiner & L. G. Lipson in C. J. Rosen et al. Aging Skeleton vi. 55 Hutchinson-Guilford..is an inherited disorder thought to be sporadic..in as much as it has a low frequency of recurrence in families. B. adj. Usually hyphenated. 1. Characterized by a low frequency (sense A. 1); (of equipment) that operates at or deals with low frequencies. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [adjective] > of specific frequency low frequency1873 high frequency1891 radio frequency1915 1873 U.S. Patent 139,459 3/2 A low frequency oscillatory current is set up. 1900 Engineering 28 Sept. 412/3 Low frequency induction telegraphy experiments..were not considered in this report. 1926 J. S. Huxley Ess. Pop. Sci. xvii. 191 The special sense-organs for perceiving low-frequency vibrations in water. 1934 B.B.C. Year-bk. 385 The output from the microphone is taken to a two-stage low-frequency amplifier. 1973 E. Boyd & R. Parkes Dark Number viii. 83 Some stimuli are so reverberant they just hum on as a low-frequency signal programmed into your unconscious. 1997 AOPA Pilot Nov. 54 (caption) The radio is just as it looked when new, although there are no longer many low-frequency navaids for it to tune. 2010 Nature 21 Oct. 927/2 A type of very low-frequency plasma wave called a chorus wave does the job. 2. That occurs relatively rarely. Also: characterized by a low rate of occurrence of something. ΘΚΠ the world > time > frequency > infrequency > [adjective] seld1398 seldom1483 rare1565 secular1599 unfrequent1611 straggling1618 infrequent1622 unobvious1643 far-between1743 rarish1772 unwonted1785 sporadic1842 low frequency1946 1946 Classical Jrnl. 41 261/1 Already knowing..all the words, except those supplied immediately below the text (as being low-frequency non-memory words or forms). 1957 Publ. Amer. Dial. Soc. xxviii. 78 Low-frequency verbs like asseverate, reiterate, aver, etc.,..would rarely be initials without that, or parentheticals. 1971 Brit. Med. Bull. 27 19/1 Much of the risk to people from tribes where the frequency [of cancer of the penis] is high is lost when they move to low-frequency areas. 2011 Courier Mail (Austral.) (Nexis) 7 Feb. (Finance) 43 Catastrophes such as floods, cyclones and earthquakes are low frequency events but with massive correlated cost. This entry has been updated (OED Third Edition, September 2013; most recently modified version published online March 2022). < n.adj.1839
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