Don’t forget the inverse square law. Even without a change in medium or any obstacles, the strength of the signal decrease over distance until it is undetectable.
This is also why there are no extraterrestrial civilizations hearing any radio broadcasts from Earth. Our transmitters are so weak that any signals we send out fade into the CMB before they get any real distance.
Don’t forget the inverse square law. Even without a change in medium or any obstacles, the strength of the signal decrease over distance until it is undetectable.
This is also why there are no extraterrestrial civilizations hearing any radio broadcasts from Earth. Our transmitters are so weak that any signals we send out fade into the CMB before they get any real distance.
If they didn’t fade with distance,
So for now we are still quiet in the dark forest.
You area conflating auditory waves with radio waves.
These are very much not the same thing. Sound waves require a medium while radio waves do not.
Radio waves travel vast distances through space while sound doesn’t travel at all.
Space is a medium, as exemplified by the fact that light curves around massive objects, because the space is curved.