Radio Waves

Scientists definitely are aware that the sound was carried via radio waves which have the capability to travel in the absence of air as in a vacuum. This explains how they were able to receive the ”space roars” in their observatory but could not explain how they happened to be and where they came from.

Alien transmitter?

Radio waves are often sent out through the use of a transmitter, just like those used by radio and television networks to beam signals from their stations all the way to our cars, stereos or television sets. That said, is it possible that a more advanced civilization alien to us in possession of such a transmitter is responsible for sending us these mysterious sounds?