Lenovo HS15 User Manual page 20

■ Listen Responsibly
To avoid hearing impairment, please make sure to turn down the volume of the music
player before connecting the earphones. After putting the earphones into/onto the ears,
turn up the volume gradually until to a comfortable listening level. Noise level is measured
in decibels (dB). Exposure to 85dB or higher noise will lead to gradual hearing impair­
ment. Please supervise your usage and the hearing impairment is a function of loudness
against time.
The louder the sound is, the shorter you can be exposed. The softer the sound is, the
longer you can listen.
■ Ear physiology diagram