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A frequently encountered measurement configuration for ultrasonic inspection of steel components consists of a single element transducer insonifiing a specimen of limited depth in pulse echo mode.In this case, the gain in signal-to-noise ratio achievable by pulsecompression technique is limited by the fact, that the duration of the transmitted chirp signals must not be longer than twice the time-of-flight from the tramitting clement to the imaging area. This is why the transducer is unable to transmit and receive simultaneously.A new class of split ted chirp signals allows to overcome this limitation. A long chirp signal is divided into several parts, each of twice the length of the time-of-flight. These parts are transmitted with time delays determined by the depth of the imaging area.The received echo signals can be pulse-compressed by a single filtering operation. Therefore a considerable gain in data aquisition speed, compared to averaging mE'thods, can be achieved.

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