3 Ways to communicate on earth
1.Telephone / Mobile Phone
So this way of communicating is the fastest way to communicate because if you send a text message to someone it delivers it in about 1 second and it's really fast to type if you spend lots of time texting on your phone. How does a text send? When you send a text it goes to a cellular tower over a pathway called the control channel. Then it goes to a SMS center (short message service center) resends that message to the tower closest to the recipient then it goes to their phone.
2. A radio
Radio transmitters work by supplying a rapidly changing electrical thing to a radio antenna like the ones on specific cars. To create a changing electromagnetic field. The speed at which these currents change controls the speed at which the electromagnetic field around the aerial changes. This is measured in hertz (Hz).
3. Paralinguistics
I don’t know much about this so I got it from the internet. Paralinguistics makes a reference to vocal communication that is different to any language. This includes points such as tone of voice, loudness, inflection, and pitch.
Consider the powerful effect that tone of voice can have on the meaning of a sentence. When said in a strong tone of voice, listeners might interpret approval and passion. The same words said in a hesitant tone of voice might convey disapproval and a lack of interest.
Why can't people hear you scream in space?
Sound is a mechanical wave, which means that it needs substance to travel through, such as air or water. In space, there is no air, so sound has nothing to travel through. If someone were to scream in space, the sound wouldn't even leave their mouths.