near field

既定 英語（イギリス） (en-GB)

名詞

(acoustics) The region within a distance a fraction of a wavelength from a sound source. Accordingly, the outer boundary of the near-field region is closer for high-pitched sound than for low-pitched sound.

日本語の意味

音響学において、音源から波長の一部にあたる距離内の領域を指す。つまり、高音の場合は低音に比べてこの近接場の外側の境界がより近くなる領域。

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Technicians mapped the sound pressure levels in the near field around the tweeter to understand why high-frequency sounds diminished more rapidly.

技術者たちは、高音域の音がより速く減衰する理由を理解するために、ツイーターの近接場周辺の音圧レベルを測定した。

詳細

意味（1）

(acoustics) The region within a distance a fraction of a wavelength from a sound source. Accordingly, the outer boundary of the near-field region is closer for high-pitched sound than for low-pitched sound.

意味（2）

(electronics, communication) The region within about half a wavelength from an electrically small antenna. More specifically it is the region within the radiansphere.

near fields （ plural ）