JAMA: The effect of portable music players on the hearing of children is
unclear. A new study found that about 1 in 7 children (9 to 11 years of
age) showed signs of noise-induced hearing impairment, prior to exposure
to known noise hazards such as club and concert attendance. Portable
music players, used by 40 percent of 2,075 children in the study from
the Netherlands, were associated with high-frequency hearing loss.
Repeated measurements are needed to confirm this association.