A new study published in BMJ Global Health found that one billion young people are at risk of hearing loss, and headphones may be partially to blame.

Researchers examined 33 existing studies involving almost 20,000 participants. They found that 24% of people ages 12 to 34 listen to music too loudly on their devices, and 48% of them go to loud shows.

People often turn music up as high as 105 decibles on their personal devices, which exceeds the permissible level of 75 for children and 85 for adults.

According to their findings, up to 1.35 billion teens and young adults could be at risk of hearing loss.