Safety Standards
The WHO has developed and is promoting safety standards for headphones and live event venues.
Links to the standards are below:
WHO global standard for safe listening venues and events
https://www.who.int/publications/i/item/9789240043114
WHO/ITU Guidelines for safe listening devices/systems
https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=14953&lang=en