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In this NASA page it describes an astronaut remaining in contact during an EVA.

While inside these pressurized suits, it's essential that they (the astronauts) remain in constant communication with the rest of the crew in space as well as Mission Control Center on Earth.

Can an astronaut ever have a private conversation with another astronaut or someone on Earth during an EVA? If so, how would they switch to the private communication?

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    $\begingroup$ Slightly related: in SciFi novels, the accepted method for private conversation between two suited people in close proximity is to touch faceplates and let the sound waves propogate directly via air-solid-solid-air . $\endgroup$ Commented Jun 9, 2020 at 11:56
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    $\begingroup$ I'm pretty sure the operational answer to this is no, but to give an good explanation of why will require some detailed knowledge of how exactly the loops get privatized in the first place, which I don't have (that whole electromagnetic wave thing). So I've asked this question: space.stackexchange.com/q/44705/6944 $\endgroup$ Commented Jun 9, 2020 at 15:02
  • $\begingroup$ @CarlWitthoft Has anything like that ever been tested in the vacuum of space, or a vacuum created on Earth? $\endgroup$
    – Bob516
    Commented Jun 9, 2020 at 15:36
  • $\begingroup$ Related, not duplicate, not yet answered: space.stackexchange.com/q/31911/26446 $\endgroup$
    – DrSheldon
    Commented Jun 9, 2020 at 16:45
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    $\begingroup$ @Bob516 I fear I don't know of any experiments done to test this. $\endgroup$ Commented Jun 9, 2020 at 17:06

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