The national standard of《Sound sytem equipment: Headphones and earphones associated with portable audio equipment Max. SPL measurement methdology and limit consideration》draft meeting was held in Beijing on November 4, 2016. The meeting is organized by CESI, and nearly 20 people joined the meeting, who come from domestic acoustic product QA institutions， acoustic component manufactures, acoustic inspection agencies, acoutic testing solution providers and Nanjing university. As an important  comittee member, RStech also joined this meeting.

           The meeting began with standard application and project found, combined the Max. SPL of sound system equipment, headset and personal music player with safety standards, then discussed the necessity of setting up this standard. Referring to EN50332-1 and EN50332-2, the meeting drafted the initial content.  Experts and committee members proposed their own opinions and suggestions, and after one day's discussion, the first version of the standard was determined.