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SAFETY NOTES
Excessive sound levels can cause permanent hearing damage.
1. Always adjust the volume to the lowest level before listening to un-
known
transmissions.
2. Use the lowest reasonable level consistent with hearing safety.
3. Don’t use high sound levels in the earphone to overcome high ambient
sound levels. That is absolutely foolish! Demand and use high isolation
earphones.
4. Don’t expose your ears to sound levels that cause them to ring. If your
ears do ring after exposure, think of it as a
warning bell
telling you not
to do that again.
OSHA (Occupational Safety Health Administration) guidelines on the
maximum allowable time exposure to sound pressure levels that will
cause hearing damage are as follows:
8 hours at 90 dB SPL
4 hours at 95 dB SPL
2 hours at 100 db SPL
1 hour at 105 dB SPL
30 mins at 110 dB SPL
15 mins at 115 dB SPL
NEVER expose your ears to 120 dB SPL or higher! Damage will occur.
