3M Peltor ComTac VII MT14H41A-300NA, User Manual

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2
EN
2.2. CAUTION
• Risk of explosion if battery is replaced by an incorrect
type.
• Always use product-specific 3M replacement parts. Use of
unauthorized replacement parts may reduce the protection
you receive from this product.
2.3. NOTE
• When worn according to these User Instructions, this
hearing protector helps reduce exposure to both continuous
noises, such as industrial noises and noises from vehicles
and aircraft, as well as very loud impulse noises, such as
gunfire. It is difficult to predict the required and/or actual
hearing protection obtained during exposure to impulse
noises. For gunfire, the weapon type, number of rounds
fired, proper selection, fit and use of hearing protection,
proper care of hearing protection, and other variables will
impact performance. To learn more about hearing protection
for impulse noise, visit www.3M.com/hearing.
• This earmuff is provided with electrical audio input. The
wearer should check correct operation before use. If
distortion or failure is detected, the wearer should refer to
the manufacturer’s advice.
• In Canada, users of hard hats combined with earmuffs
must refer to CSA Standard Z94.1 on industrial protective
headwear.
• When selecting accessories to respiratory personal
protective equipment, such as hard hat mounted hearing
protection, please consult the NIOSH approval label or
consult 3M Technical Services for approved
configurations.
2.4. U.S. EPA REQUIRED STATEMENTS
Improper fit of this device will reduce its effectiveness in
attenuating noise. Consult the enclosed instructions for
proper fit.
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
continuous 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 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 92 dB(A).
2. The NRR is 22 decibels (dB).
3. The level of noise entering the ear is approximately
equal to 70 dB(A).
CAUTION: For noise environments dominated by frequencies
below 500 Hz the C-weighted environmental noise level should
be used.
3. FCC AND IC INFORMATION
This device complies with Part 15 of the FCC rules and Indus-
try Canada’s license-exempt Radio Standards Specifications.
Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesirable operation.
Note: Changes or modifications not expressly approved by
the manufacturer could void the user’s authority to operate
the equipment.
Note: This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and
receiver.
-Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for
help.
This portable device with its antenna complies with FCC/IC
RF exposure limits for general population / uncontrolled
exposure. The antenna used for this device must not be
co-located or operating in conjunction with any other antenna
or transmitter.
This Device complies with Industry Canada License-exempt
RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including
interference that may cause undesired operation of the
device.
4. LABORATORY ATTENUATION
4.1. EXPLANATION OF LABORATORY
ATTENUATION TABLES
A:A Headband with foam cushion
A:B Headband with gel cushion
A:C Helmet attachment with foam cushion
A:D Helmet attachment with gel cushion
A:1 Frequency (Hz) (ƒ)
A:2 Mean attenuation (dB) (Mf)
A:3 Standard deviation (dB) (sf)
• If the requirements above are not adhered to, the protection afforded by the earmuffs will be severely impaired.