Klipsch R5 Owner's Manual page 5

11. NEVER operate a motor vehicle while listening to or
wearing your headphones. Not only dangerous,
it is illegal in many places.
12. NEVER operate heavy machinery while listening to or
wearing your headphones.
We don't recommend you use the headphones while riding
13.
a bicycle, running,or walking in heavy traffic areas.
WARNING:
Except in case of emergency, Klipsch recommends you do not use
these headphones or headsets (headphones plus microphone) as
aviation communication equipment as they are not engineered
for many environmental conditions common in commercial or
non-commercial aircraft (including, but not limited to: altitude,
temperature, noise conditions, unpressurized aircraft, etc.)
resulting in possible interference to critical communications.
The Occupational Safety Health Administration (OSHA) has
issued headphone usage recommendations for maximum daily
exposure and sound pressure levels (measured in decibels (dB)).
A decibel is a unit of measure of sound, and decibels increase
exponentially as sound gets louder. For example, conversational
speech is typically around 60dB, and a rock concert in a stadium
is often about 110dB.
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