Meters music OV-1 Manual De Usuario página 7

The function of the Meter:
The VU meter featured on the left and right ears of the headphones are a
line-level signal indicator designed to make others around aware of how loud
your music is.
This can been seen as a safety feature for concerned parents and guardians.
Listening to loud music for prolonged periods of time can course severe hearing
damage. Please see Fig 2.0 for reference of listening volumes.
Fig 2.0:
Prolonged exposure at high volume settings to the sound from
headphones or earphones can damage a user's hearing.
To minimise the risk of hearing impairment, a European standard
has been issued which specifies test procedures for measuring
the sound levels from the headphones and earphones of
personal music players and similar consumer equipment.
THE METER:
HEARING
SAFE
DAMAGE
85dB 91dB
94dB
97dB
55dB
110dB