DS DS/EN 61266
DS DSEN 61266 1995-SEP-06 Ultrasoncs - Hand-held probe doppler foetal heartbeat detectors - Performance requrements and methods of measurement and reportng
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This International Standard, IEC 1266, specifies methods of evaluating the performance of ultrasonic foetal heartbeat detectors and, in particular, specifies a method of determining the sensitivity of the system to the detection of a moving target.