As of July 1, 2004, EN50332 has been formally implemented as a mandatory standard in Germany (German standard DINEN 50332) and within Europe. The range of tests includes the maximum headphone sound pressure measurement in all portable audio equipment with headphones or headphone jacks. In fact, in the latest European audio and video equipment safety standards EN60065: 2002 has taken into account the EN50332, in its section 3.1 clearly made headphones can not produce too high sound pressure, test methods and limits refer to the European standard EN50332-1 And EN50332-2.

EN50332 standard, the use of a standard test ear with the artificial artificial head (HATS) in the standard acoustic test room to test, the test signal is strictly defined, must be in accordance with the standard IEC60268-1, corresponding to different playback equipment, the test signal should be based on The test equipment will be closed, the volume adjustment to the maximum, adjust the tone to the headset to reach the maximum sound pressure position; test will be repeated five times, the maximum sound of the test system, The test results of the pressure level will take the average value; for simple playback devices without headphones, the maximum output voltage should be measured and evaluated.