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Proper Fit
When worn properly, this headset will provide significant hearing protection. If it is not worn
properly, the headset’s effectiveness in reducing harmful noise is severely compromised.
• The length or vertical fit of the headset ear dome is adjusted by the headband or head -
strap. Adjust as necessary to achieve a fit that ensures the headset ear dome completely
covers the ear.
• For maximum comfort, wear the headset as far back on the head as possible, while ensur-
ing the ear dome still completely covers the ear. If discomfort is felt in the jawbone, you are
wearing the headset too far forward.
Caution
This Firecom headset provides 24dB noise attenuation when properly fitted to the user and
worn as instructed. Any modification to the hearing protector such as drilling holes in the
dome, painting or reforming the headband spring, will negatively impact the hearing protector’s
performance and hearing damage could occur.
Federal law requires the following statements:
“Although hearing protectors can be recommended for protection against the harmful effects
of impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation of continu-
ous noise and may not be an accurate indicator of the protection attainable against impulsive
noise such as gunfire.”
“The level of noise entering a person’s ear, when a hearing protector is worn as directed, is
closely approximated by the difference between the A - weighted environmental noise level
and the NRR.
Example
1. The environmental noise level as measured at the ear is 92dBA.
2. The NRR is 24dB.
3. The level of noise entering the ear is approximately equal to 92dB (A) – NRR or 68dB.
Caution
For noise environments dominated by frequencies below 500 Hz, the C - weighted environ-
mental noise level should be used.
Always wear a hearing protector in areas that have been identified as high noise locations.
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