ring-down time

ring-down time

(in ultrasonics) the time required for vibration of the transducer element at its resonance frequency to decrease to a negligible level following excitation. See also pulse duration.
References in periodicals archive ?
The exponential decay time, or ring-down time, of the photons is affected by the sample's gas molecules.
Changes in the ring-down time can be used to identify and quantify specific molecules.