Case 7:20-cv-02945-MCR-HTC Document 20-20 Filed 08/09/22 Page 1 of 5
PX-23 

FILED UNDER SEAL 

PLAINTIFFS'

TRIAL EXHIBIT

P-GEN-00977

P-GEN-00977.1 Case 7:20-cv-02945-MCR-HTC Document 20-20 Filed 08/09/22 Page 2 of 5
P-GEN-00977.2 Case 7:20-cv-02945-MCR-HTC Document 20-20 Filed 08/09/22 Page 3 of 5
• Patented Dual-Protection 

• Low-Level Sounds 

 Heard Clearly 

• High Impulse Noise 

 Blocked Instantly 

• Premolded Triple-Flange 

 Design Fits Most Earcanals 

• Comfortable & Reusable 

 No Batteries or Moving Parts 

FOR MORE INFORMATION 

 VISIT WWW.E-A-R.COM.

DUAL-END DESIGN DUAL-END DESIGN

Insert the plug’s yellow end for Insert the plug’s yellow end for 

ambient “hear-through” protection.

Insert the green end when exposed 

to steady high level noise (aircraft, to steady high level noise (aircraft, 

armored vehicles, etc.) and the armored vehicles, etc.) and the 

COMBAT ARMS plug will provide COMBAT ARMS plug will provide 

a constant NRR of 22 dB. a constant NRR of 22 dB.

SPECIALLY DEVELOPED 

FOR THE ARMED FORCES 

AND LAW ENFORCEMENT.

COMBAT ARMS earplug’s 

patented design allows wearers 

to hear low-level sounds critical 

to mission safety – conversation, 

footsteps, rifle bolts, approaching 

enemies. When needed, the plug’s 

“filter” reacts to provide instant 

protection from high-level noises 

like weapons fire and explosions. 

It’s that easy. It’s that quick.

Now you don’t have to sacrifice 

your hearing in order to protect it. 

Specify COMBAT ARMS from E-A-R.®

P-GEN-00977.3 Case 7:20-cv-02945-MCR-HTC Document 20-20 Filed 08/09/22 Page 4 of 5
EAR®, Combat ArmsTM and the Color Yellow are trademarks licensed to Aearo Technologies. © 2006 Aearo Technologies.

ISL is a trademark of the Research Institute of Saint Louis. 

AEARO TECHNOLOGIES . 8001 WOODLAND DRIVE . INDIANAPOLIS, IN . 46278

NOW AVAILABLE IN A CONVENIENT BLISTER PACK

BLISTER PACK

INCLUDES:

1 PR. OF DUAL-ENDED

COMBAT ARMS EARPLUGS

CARRYING CASE

INSTRUCTION GUIDE

FLAME RETARDANT LANYARD

Soft, Flexible 

Flanges For 

Comfortable Seal

“Stealth” 

Green Color No Battery or 

 Moving Parts.

Made of Washable, 

Reusable Polymer

INSERT THE YELLOW END: 

No Dangerous Hearing Impairment.

Other earplugs can put soldiers or police 

officers in increased danger by suppressing 

their ability to hear critical ambient sounds 

around them during tactical maneuvers.

The yellow Combat Arms plug features a 

nonlinear acoustical design with a calibrated 

filter within its stem. The result? Most low 

level sounds are heard clearly during 

wear...virtually unaffected. 

 Instant Protection – No Switch Time Delay.

When loud impulse noises such as weapons fire 

or explosives occur, the filter “reacts” instantly 

and suppresses the noise to a safer level. 

The chance of permanent hearing damage or 

disorientation from explosion is greatly 

reduced or eliminated. 

INSERT THE GREEN END:

Constant Protection For Constant Noise.

The green end of the Combat Arms Earplug 

provides steady protection with an NRR of 

22 dB. This is the ideal wearing position when 

exposed to constant high-level sound sources 

(85 dB and above) such as aircraft, watercraft, 

armored vehicles or machinery. In this mode, 

the plug provides excellent protection against 

noise, but it will block speech and other ambient 

sounds as well.

EVALUATED AND SPECIFIED 

BY THE U.S. ARMED FORCES

DETECTION AT DISTANCE

TRUCK

400 M

TRUCK

800 M

HEARING WITHOUT 

EARPLUG

HEARING WITH 

YELLOW COMBAT 

ARMS EARPLUG

HEARING WITH 

FOAM EARPLUG

TRUCK

800 M

Army Research Laboratory Data. 

33223B 4.06

CAE VERSION

Dual-Ended

Single-Ended

DEVICE 

Yellow end (level dependent)

Green end (steady state)

Single-End

Combat Arms Plug 

NRR

0

22

8

Class

None

AL

C

Freq (Hz)

Mean

Std. Dev.

Mean

Std. Dev.

Mean

Std. Dev.

125

4.7

4.0

32.7

5.9

4.4

3.4

250

4.2

4.3

31.8

6.1

4.0

2.7

500

6.0

5.0

33.0

6.5

10.0

2.6

1000

9.5

6.7

32.0

5.5

17.6

3.1

2000

16.7

4.9

34.5

4.1

24.6

3.2

3150

18.6

5.7

37.3

5.3

27.1

4.5

4000

16.3

5.8

38.9

6.1

24.0

4.5

6300

16.7

6.1

43.8

6.7

26.7

4.5

8000

17.2

6.8

43.3

6.9

22.2

4.7

Testing to ANSI S3.19-1974 in E-A-RCALSM Acoustical Laboratory accredited by NVLAP. 

NSN Number (Dual-End Design): 6515-01-466-2710 

NSN Number (Single-End Design): 6515-01-512-6072

Product Code UPC Description Minimum Case Case Dimensions Case NRR NRR 

 Purchase Info Quantity L x W x H (in.) Wt. (lbs.) (Green End) (Yellow End)

370-1011 0 80529 70013 1 Combat Arms Blister Pack 1 Case 10 blister packs 8.25 x 6 x 8 1.98 22 dB 0 dB

370-1000 0 78371 90579 8 Bulk Combat Arms Dual-End 1 Case 50 pair 6.75 x 6.50 x 5.25 0.48 22 dB 0 dB

370-1010 0 80529 70010 0 Bulk Combat Arms Single-End 1 Box 100 pair 9.25 x 6.25 x 11.75 1.14 NA 8 dB

P-GEN-00977.4 Case 7:20-cv-02945-MCR-HTC Document 20-20 Filed 08/09/22 Page 5 of 5