In 1974, the US Environmental Protection Agency recommended a 24-hour exposure limit of 70 dBA, taking into account the lack of a "rest period" for the ears when exposures are averaged over 24 hours and can occur every day of the year (workplace exposure limits assume 16 hours of quiet between shifts and two days a week off).[12] In 1995, the World Health Organization (WHO) similarly concluded that 24-hour average exposures at or below 70 dBA pose negligible risk for hearing loss over a lifetime.[13] Following reports on hearing disorders from listening to music,[14][15][16][17][7] additional recommendations and interventions to prevent adverse effects from sound-related recreational activities appear necessary.[8][9][21]