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 an
intense "impulse" sound, such as an explosion, or by continued exposure to
loud 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).
NIHL
Operate and store this product within the temperature range of -4°F to 113°F
(-20°C to 45°C) only. Charge the battery where the temperature is between
41°F and 104°F (5°C and 40°C) only.
TEMPERATURE RANGE
Master & Dynamic uses NFMI technology for connecting one earphone to the
other. While this is industry leading technology, and not specific to Master &
Dynamic products, there may be some instances where interference or
micro drop outs may occur.
Intermittent interference or micro drop outs can be caused by numerous
factors, but common causes include, but are not limited to the following: door
security systems, bus/metro token machines, large metal objects and close
proximity to other NFMI-enabled devices.
NFMI
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General
Weight and Dimensions
