How NASA astronauts communicate in space without speaking?
Nonverbal communication is key during astronaut spacewalks. Astronauts can whistle, talk, or even yell inside their spacesuits, but the other astronauts will not hear the noise. In fact, the middle of space is extremely quiet. Sound travels in waves at different speeds through air, water, and other materials. But it must pass through something or it will not travel at all.
Therefore, to transmit essential information in the hazardous, hand gestures must be memorized and flawlessly performed.
To aid in the development of essential nonverbal skills, NASA astronauts are required to understand and practice silent signals that convey everything from numbers and emotions, to air pressure malfunctions and radio issues. Many of these gestures are shared by scuba divers, pilots, and military combat units. According to Astronauts, a person's face can tell you the answer, and you can do all of this with just a glance.
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