User Manual

MH40 Wireless Over-Ear HeadphonesUSER MANUAL 8
NIHL is a preventable condition caused by both one-time and extended
exposure to excessive decibel (dB) levels. This harm to sensitive inner ear
structures is irreversible and people of all ages can be affected. Damage can
happen in a single event or gradually over time. One-time exposure to sounds
louder than 110 decibels and extended exposure to sounds over 85 decibels
can cause harm. Indicators of NIHL include hearing loss and tinnitus, a
condition of sensing constant ringing, buzzing or roaring. The NIDCD (National
Institute on Deafness and Other Communication Disorders) offers this simple
rule of thumb: avoid sound exposure that is “too loud, too close or too long.”
Here are some general references to sound levels that occur in everyday life:
refrigerator humming (45 dB); normal conversation (60 dB); city traffic (85
dB); motorcycles (95 dB); an MP3 player at full volume (105 dB); sirens (120
dB); firecrackers (150 dB).
Our ability to hear is amazing. Treat your ears like the precious tools they are, and
they will continue to provide you with exceptional data, as well as a lifetime of
incredible sonic experiences.
In general, do not listen “too loud or for too long,” and be attentive to your own
ears. Ringing, discomfort, or sensitivity to high frequencies and treble may be a
signal from your ears that you are pushing them to their limits and causing
irreparable damage.
As a general practice, find what seems to be your preferred listening level and
then adjust the volume down another 10% or more. Surprisingly, your ears will
attune to a slightly lower volume over time, and what seems quiet at first can be
perfect for longer listening periods.
PREVENTION OF NOISE-INDUCED HEARING LOSS