zero-crossinghttp://www.oed.com/dictionary/zero-crossing_n%3Ftab%3Dmeaning_and_usezero crossing, n.
Revised 2018

zero crossingnoun

  1. 1941–
    The crossing of the horizontal axis by a mathematical function as it passes through zero and changes sign; a point where this occurs; frequently attributive.
    The analysis of zero crossings is often an important activity in the study of complex waveforms, as is done in the fields of acoustics, electronics, and image processing.
    1. 1941
      Equalization of adjacent harmonics insures that the zero crossings of Fig. 6 are equally spaced.
      U.S. Patent 2,266,802 2/2
    2. 1969
      Equipment capable of analysing and recognizing speech..has achieved considerable success using the so-called zero crossing technique.
      New Scientist 1 May 225/1
    3. 2012
      The zero crossings of the click response are not equidistant.
      H. Duifhuis, Cochlear Mech. iii. 50

Originally published as part of the entry for zero, n. & adj.

zero, n. & adj. was revised in June 2018.