near fieldn.

Brit.

/nɪə ˈfiːld/, U.S.

/ˈnɪr ˈfild/

Origin: Formed within English, by compounding. Etymons: near adj., field n.¹

Etymology: < near adj. + field n.¹

Physics.

The region close to a radiating source (esp. of sound or radio waves), where the variation of the field vector with distance differs from that at large distances. Frequently attributive.The near field is generally taken as extending a distance from the source equal to the wavelength λ, or to 2L²/λ, where L is the diameter of the source.

ΚΠ

1931 Proc. IRE 19 461 The electric field of a Hertzian dipole can be divided into three parts, designated as the near-by field, the transition field, and the remote field.]

1939 Wireless Engineer 16 361/1 The questions here dealt with are those of focusing of ultra-short waves in the laboratory... Measurements of the near field are described.

1954 Proc. Royal Soc. A. 222 26 Their intensity measurements at these frequencies in the near field are greatest at about five diameters from the orifice.

1961 Proc. Royal Soc. A. 261 7 The appearance of the inverse first power of the distance shows that we are here in the realm of near-field theory, not of wave theory.

1988 V. Capel Audio & Hi-Fi Engineer's Pocket Bk. 21 A precise determination of the extent of the near field is not normally possible.

1990 Gramophone May 2094 (caption) Conventional control room layout for stereo monitoring. Using the alternative nearfield monitors gives a reduced area in which the stereo effect can be properly assessed.

1999 Wired Nov. 316/3 Most people perch fairly close to their computer, so the Elan was designed for what's called near-field listening.

This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2022).

单词	near field
释义	near fieldn. Brit. /nɪə ˈfiːld/, U.S. /ˈnɪr ˈfild/ Origin: Formed within English, by compounding. Etymons: near adj., field n.¹ Etymology: < near adj. + field n.¹ Physics. The region close to a radiating source (esp. of sound or radio waves), where the variation of the field vector with distance differs from that at large distances. Frequently attributive.The near field is generally taken as extending a distance from the source equal to the wavelength λ, or to 2L²/λ, where L is the diameter of the source. ΚΠ 1931 Proc. IRE 19 461 The electric field of a Hertzian dipole can be divided into three parts, designated as the near-by field, the transition field, and the remote field.] 1939 Wireless Engineer 16 361/1 The questions here dealt with are those of focusing of ultra-short waves in the laboratory... Measurements of the near field are described. 1954 Proc. Royal Soc. A. 222 26 Their intensity measurements at these frequencies in the near field are greatest at about five diameters from the orifice. 1961 Proc. Royal Soc. A. 261 7 The appearance of the inverse first power of the distance shows that we are here in the realm of near-field theory, not of wave theory. 1988 V. Capel Audio & Hi-Fi Engineer's Pocket Bk. 21 A precise determination of the extent of the near field is not normally possible. 1990 Gramophone May 2094 (caption) Conventional control room layout for stereo monitoring. Using the alternative nearfield monitors gives a reduced area in which the stereo effect can be properly assessed. 1999 Wired Nov. 316/3 Most people perch fairly close to their computer, so the Elan was designed for what's called near-field listening. This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2022). < n.1939
随便看	delirament delirancy delirant delirate delirating deliration delirations delire delirement delirestaurant deliria deliriant deliriants deliriate deliriated delirifacient delirifacients deliring delirious deliriously deliriousness deliriousnesses delirium delirium tremens deliriums