In [[acoustic]] transit time or [[sonic log|sonic logging]]. When the amplitude of the first arrival form (cycle of the [[acoustic]] [[wave train]] is large enough to be detected by the near [[receiver]] of a receiver pair) but not large enough to be detected by the far receiver, then one or more cycles will be skipped until a later cycle arrives which has energy above the detection level. This situation is called "cycle skipping." Its onset is characterized by a sharp deflection on the transit time [[curve]] corresponding to one or more added cycles of time between receivers. "Short cycle skipping," where the near receiver is triggered a cycle too late can also occur, resulting in an abnormally short [[travel time]].

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