A stunning one in five teens has lost a little bit of hearing, and the problem has increased substantially in recent years, a new national study has found.

Some experts are urging teenagers to turn down the volume on their digital music players, suggesting loud music through earbuds may be to blame – although hard evidence is lacking. They warn that slight hearing loss can cause problems in school and set the stage for hearing aids in later life.

“Our hope is we can encourage people to be careful,” said the study’s senior author, Dr. Gary Curhan of Harvard-affiliated Brigham and Women’s Hospital in Boston.

The researchers analyzed data on 12- to 19-year-olds from a nationwide health survey. Full Post…