near field

== English == === Alternative forms === near-field === Noun === near field (plural near fields) (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. (electronics, communication) The region within about half a wavelength from an electrically small antenna. More specifically it is the region within the radiansphere. Antonym: far field ==== Derived terms ==== near field communication === References ===