A new study conducted by BMJ Global Health Journal has disseminated damning statistics for young music fans. Between 670 million and 1.35 billion teens and young adults worldwide risk hearing loss due to frequent music listening at unsafe volumes.

Titled "Prevalence and Global Estimates of Unsafe Listening Practices in Adolescents and Young Adults: A Systematic Review and Meta-Analysis," the study underscores the danger of constantly attending live shows without hearing protection and over-loud music in headphones and earbuds.

Culled from 33 previous studies on the matter, the results are drawn from 19,000 people aged 12 to 34. The 35 personal records were split between personal listening devices (17) and live shows (18). 24% of those using personal devices were at risk, and 48% of concertgoers were subject to unsafe decibel levels. As around 2.8 billion people are in that age group, 670 million to 1.35 billion – yep, that's 1,350,000,000 – are in danger of hearing loss.

A study in 2015 conducted by the World Health Organization came to a similar conclusion of approximately one billion at-risk individuals. You can read the full BMJ study here.