A Snoopy cap, or communication cap, is a part of a

space suit A space suit (or spacesuit) is an environmental suit used for protection from the harsh environment of outer space, mainly from its vacuum as a highly specialized pressure suit, but also its temperature extremes, as well as radiation and ...

worn by American astronauts on the head and incorporating an

audio headset A headset is a combination of headphone and microphone. Headsets connect over a telephone or to a computer, allowing the user to speak and listen while keeping both hands free. They are commonly used in customer service and technical support ce ...

for communication. The cap is nicknamed after the Peanuts character, whom its black and white paneling resembled. Its

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...

designation is Communications Carrier Assembly. The "Snoopy cap" includes two earphones and two microphones, to tolerate failure of a single unit.

References

Space suit components Headgear Peanuts (comic strip) {{NASA-stub