ultraheliimpulsside peegeldumisel (vastukajamisel) põhinev mittepurustav katse (vt ultrahelikatse, ultraheliimpulss-ehhokatse), pulse-echo method of non-destructive testing, in which a short pulses of ultrasonic energy are introduced into a testpiece at regular intervals of time while some or all of the energy is reflected (see: ultrasonic test, ultrasonic pulse-echo test)