Aegisound DC2 User manual

THE SOUND OF SAFETY
INSIDE:
Description. .. . . .. . . .. . 2
Features .............2
Before Usage .........3
Switching Protection .. . 4
Removing/Replacing
Earplugs . .. . . .. . . .. . 5
Headband Adjustment 5
Fitting DC2 w/Earplugs 6
Replacing Earseals . .. . 7
Earcup Removal.......8
Cleaning .............9
Replacement Parts . .. . 9
Caution ..............10
Warning .............11
Contact ..............12
USER MANUAL
DC2
Hearing Protection System
PIN: 05-028001

2|DC2 HEARING PROTECTION SYSTEM
Adjustable
Headband
Dual
Earseals Earcup
Overview
The DC2 circumaural hearing protector is a unique earcup/ear-cushion design
that provides excellent safety for both single and double hearing protection
applications.The inner earcup is surrounded by a second outer earcup offering extra
performance in high noise applications.
Features
•Unique double-cup double-seal design with custom foam earseals for lasting
comfort and improved protection.
•Earmuff and headband assembly are designed to increase population t rate and
prevent foreign object damage (FOD).
•Both large and small volume, rugged earcups are designed to provide excellent
overall sound attenuation and meet harsh environmental and handling
requirements.

USER MANUAL |3
Before Usage
Always evaluate the adequacy of your protective gear before entering hazardous
environments.
The wearer should ensure that:
•The earmuff is tted and maintained in accordance with the
manufacturer’s instructions. Improper t of this device will reduce its effectiveness
in attenuating noise. Consult the included instructions for proper t.
•The earmuff has been inspected for serviceability.
•The earmuff is worn at all times in noisy surroundings.
The use of any hearing protective device will not guarantee adequate protection for
hearing loss for all persons under all circumstances. Consult your physician frequently
when being exposed to high noise levels. If exposure to high noise levels occurs
during employment activities, consult your employer regularly as well.
US Federal Law requires the following additional statements:
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 Noise Reduction Rating (NRR).
Example:
1. The environmental noise level as measured at the ear is 92 dBA.
2. The NRR is 31 decibels (dB).
3. The level of noise entering the ear is approximately equal to 61 dB(A).
Caution:
For noise environments dominated by frequencies below 500 Hz, the C-weighted
environmental noise level should be used.
Although hearing protectors can be recommended for protection against the harmful
effects of impulsive noise, the 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 gunre.

4|DC2 HEARING PROTECTION SYSTEM
Double hearing protection should be worn at all times in high noise
environments above 104 dB(A). Single hearing protection is only
acceptable in moderate to low noise environments.
DC2 with CTE30X Earplugs Installed
Switching Between Single and
Double Hearing Protection
CTE30X
Earplugs
The DC2 can be worn in either a single
hearing protection (SHP) or double hearing
protection (DHP) conguration by installing
Aegisound’s CTE30X custom molded
earplugs into the slot in the inner earcup.
Both large and small volume, rugged
earcups are designed to provide excellent
overall sound attenuation and meet harsh
environmental and handling requirements.

USER MANUAL |5
1. Remove the foam from inside the
earcup.
Removing and Replacing
Earplugs
2. Locate the locking groove on
the top of the inner earcup.
4. To remove the earplug, push the
straight tether section between
the ball and the coil deeper into
the earcup until the ball snaps
out of the slot.
3. Insert the earplug by snapping the
ball into the slot. Replace the foam
insert into the inner earcup.
Headband Adjustment
The headband is assembled to slide for adjustment. The friction required to adjust the
headband or to x the headband in place may be adjusted by tightening or loosening
the lock nut on each side of the headband near the headpad with an 11/32 inch or
adjustable wrench.

6|DC2 HEARING PROTECTION SYSTEM
1. Position the headset around
the neck so that the right
(RED) earplug is on the right
shoulder, and the left (BLUE)
earplug is on the left shoulder.
R
2. Insert the right (RED)
earplug into the right ear.
3. Insert the left (BLUE)
earplug into the left ear.
4. Place the headset on
the head, and allow
the coil to pull into
the earcup.
5. Place the headset over
the ears. Retract the
coils completely inside
the earcups.
Fitting DC2 with Earplugs

USER MANUAL |7
1. Remove the old earseals by pulling
the inner and outer earseals from
the earcups.
2. Remove the new earseals from
the adhesive paper backing.
3. Align and orient the inner earseal onto
the inner earcup and press it in place.
4. Orient the outer earseal onto
the outer earcup and press it
in place.
Replacing Earseals

8|DC2 HEARING PROTECTION SYSTEM
Earcup Removal
To install the headset into some head protective devices, one or both of the earcups
may need to be temporarily removed.
1. Use a #1 Phillips screw driver to remove the ¼ turn fastener holding each side of
the earcup to the metal strap.
2. To remove, gently rotate the fastener ¼ turn counterclockwise (CCW). The cam
will disengage, and the fastener head will stop turning when the fastener is
disengaged. Too much applied torque may damage the fastener or insert.
3. Pull the strap away from the earcup. The fastener is captured on the strap so it
should not fall away.
4. To reinstall the earcup, insert the fastener into the insert, and gently rotate the
fastener ¼ turn clockwise (CW) to reengage the fastener. A click should be heard
as the fastener cam engages the insert. Too much torque may cause damage to
the fastener or the insert.
5. Gently try to pull the strap away from the earcup to verify the fastener is
reengaged.
6. Repeat for the opposite earcup side.
Pull on Stirrup to
Verify Fastener
Engagement

USER MANUAL |9
Please refer to the following part numbers when ordering:
Part Number Description
05-028001 DC2 Headset
05-001003 CTE30X Earplugs
05-028002 DC2 Foam Earseal Kit
05-999002 Aegisound Ear Gel
NOTE: CTE30X custom t earplugs require ear impressions prior to manufacturing.
Contact Gentex Corporation or visit the website for details before ordering
custom earplugs.
Cleaning
1. Clean the headset and the ear seals using a cloth dampened with mild soap
and tap water.
2. Wipe it clean with a cloth dampened with tap water to remove soap residue.
3. Surfaces may be wiped with alcohol or disinfecting wipes if desired.
Replacement Parts
To reorder parts or to order replacement parts, please contact Gentex Corporation at
[phone], or visit our website at www.gentexcorp.com/aegisound

10 |DC2 HEARING PROTECTION SYSTEM
Caution
Inserting or removing custom the earplugs too quickly may result in air
pressure or suction against the eardrum causing temporary pain. The
earplugs should be inserted or removed slowly with a twisting motion to
prevent excess pressure buildup. Gently moving the earplug while opening
the jaw fully may remove excess pressure buildup.
Prolonged use of the earplugs (exceeding several hours) may result in
temporary soreness near the ear canal. Use of solid earplugs such as the
CTE30X may reduce the risk of this irritation when compared to expandable
foam type plugs. The use of the earplugs may require a “break-in” period to
accustom the ear canal to the presence of the earplug.
In order to ensure maximum performance, the ear canal should be clean and
free of excess ear wax and debris before inserting the earplugs. Long term
usage of the earplugs could result in the buildup of ear wax within the ear.
In the event that ear wax or debris becomes impacted in the ear canal, seek
medical consultation.
When not in use, store the earplugs in the earcups. Surfaces that have been
dyed should be avoided to prevent the possibility of having the dye transfer
onto the earplugs. The earplug surfaces should remain clean and free of
other contaminates that could cause irritation of the ear canal such as sand
and grit.
The earplugs should be cleaned periodically with warm, soapy water to
prevent buildup of dirt and bacteria. Ear inammation, otitis externa, or other
infection could result from the use of dirty earplugs. In the event of pain or
discharge from the ear canal, seek medical consultation.
CTE30X earplugs are made from an immunologically inert material,
and allergic reactions would be rare. In the event an allergic reaction is
suspected, discontinue use, and seek medical consultation.
Do NOT hang or swing the headset by the earplugs or the tether.

USER MANUAL |11
www.gentexcorp.com/patents
Warning
Earplugs are custom made to t each wearer’s ears. They will not work
for anyone else’s ear. Attempting to use custom earplugs that are not the
wearer’s own, may result in damage to the ear canal.
Always wear both the headset and the earplugs when in high noise
environments.
Never remove the earplugs or the headset while in high noise environments.
Failure to comply with general safety precautions violates the safety intent of
this product and may result in bodily harm or damage to the product. Gentex
Corporation claims no liability for damage or injury resulting from a failure to
comply with the safety precautions outlined in this manual.
Frequently detaching and reattaching the earplugs from the headset should
be avoided. If you need to remove the earplugs from the headset more often
than weekly, please contact Gentex Corporation to purchase an alternative set
of custom earplugs.

01-000009, Revision 6
Noise
Reduction
Rating 31
(WHEN USED AS DIRECTED)
DECIBELS
THE RANGE OF NOISE REDUCTION RATINGS FOR EXISTING
HEARING PROTECTORS IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS).
Gentex Corporation
Manchester, New Hampshire DC2
Federal law prohibits
removal of this label
prior to purchase
Label Required by U.S. EPA
regulation 40 CFR part 211,
subpart B
DC2 tested to ANSI S3.19-1974
Frequency (Hz) 125 250 500 1000 2000 3150 4000 6300 8000
Mean (dB) 21.4 30.3 45.5 44.0 41.5 43.4 44.3 43.3 45.6
Stand. Dev. (dB) 3.0 3.9 4.8 3.9 3.8 3.8 3.3 3.9 2.9
Mean-2SD (dB) 15.4 22.5 35.9 36.2 33.9 35.8 37.7 35.5 39.8
Gentex Corporation
645 Harvey Road, Suite 102
Manchester, NH 03103 USA MADE IN THE USA
[phone]
[email protected]