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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.
OSHA GUIDELINES FOR NOISE EXPOSURE
LIMITS
Sound
Pressure
Level
Recommended
Maximum Exposure
Per Day
90dB 8 Hours
92dB 6 Hours
95dB 4 Hours
97dB 3 Hours
100dB 2 Hours
102dB 1.5 Hours
105dB 1 Hours
110dB 30 Minutes
115dB 15 Minutes or less
120dB
Avoid as damage may
occur