2007YY/T 1088-2007 Guidance for the measurement and characterization of ultrasonic fields generated by medical ultrasonic equipment using hydrophones in the frequency range 0.5MHz to 15MHz
1986YY/T 91088-1999 Methods of measuring the pulse acoustic pressure of ultrasonic diagnostic equipment for medical use
YY/T 91088-1999 Methods of measuring the pulse acoustic pressure of ultrasonic diagnostic equipment for medical use was changed to YY/T 1088-2007 Guidance for the measurement and characterization of ultrasonic fields generated by medical ultrasonic equipment using hydrophones in the frequency range 0.5MHz to 15MHz.