12
13
Correct Operation
Maintenance
neutral soapsuds or detergent for cleaning. Do not put it into water for
cleaning.
• After the operation for some time, please use dry cloth or the tower with
• Keep the headphone away from strong magnet to avoid demagnetizing
or headphone sensitivity decreased.
The average person can hear the music safely at 70% volume for 4.6 hours
every day. It is very important to know the volume and time when hearing
music. Use your equipment sufficiently at safe volumelevel to enjoy the
outstanding sound performance.
To avoid hearing loss, please set the playing equipment volume to minimum
before connecting the headphone (or earphone). After wearing the head-
phone (or earphone), increase the volume to a proper level. The noise is
calculated by dB. The noise above 85 dB leads to hearing loss.
Please pay attention to your operation habit. The relationship of volume &
hearing time and hearing loss as below:
the higher the volume is, the shorter the hearing time should be. The more
proper the volume level is, the longer the hearing time can be. The long time
hearing at high volume level leads to permanent hearing loss.
This dB table lists the comparison of some normal sounds and the potential
hurt level to your hearing.
100dB
85-90dB
70dB
50-60dB
30dB
Noise Level
It is recommended to hear the sound of
90-100dB for less than 15 minutes
85dB (continuously 8 hours) is the level to
hurt the hearing
It has some invasion and interference to
the telephone talking
Comfortable hearing
l
evel is below 60dB
Very quiet
Consequence on Hearing
Garbage cleaning machine
or cement mixer
Food processor
Vacuum cleaner/
hair drier
Quiet office
Whisper
Sound Source
110dB
Hearing the sound over
100dB
w
ithout any
protective measure leads to permanent
hearing loss
Electric motor saw/
electric drill
• Operating the headphone in high temperature or high humidity leads to
headphone damage or shortening the headphone life.
HF 580
Hi-Fi Planar Headphone
HF 580
Hi-Fi Planar Headphone
110-140dB
The painful hearing threshold is about
120dB
Rock & roll concert
(it depends)
