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Communication and Hearing Protection
| Aearo (manufactures communication & hearing protection under the Peltor name) |
| ARC (Astra Radio Communications). Manufactures specialized microphones for law enforcement and surveillance operations) |
| David Clark (manufactures hearing protectors and an extensive line of wired communication systems) |
| Otto Communications (manufactures two way radio accessories for covert communications and surveillance) |
| Peltor (manufactures hearing protectors and wireless communication systems) |
| Sensear (manufactures electronic hearing protection with bluetooth communications for cell phones) |
| Sigtronics (manufactures wired communication systems for aircraft and emergency vehicles) |