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The ER-15 custom earplugs use flat frequency response filters to protect your hearing, while maintaining complete clarity of sound.
The earplugs reduce the ambient noise by around 15dB and allow the crew to communicate normally with each other.
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The Duocom communication system takes in the sound of the voice through the ear by electronic means.
A special transducer has been developed for this, which can both serve as telephone (loudspeaker) and microphone.
This transducer is so small that this can be build-in inside the ear protectors "in the ear" as it were.
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