Cats normally don't meow at each other, but some do, especially if they are vocal. I have noticed that the more you talk to a cat, the more vocal they are. My roommate had a cat when we first moved in and he never meowed, but I am the type who talks to animals, so he started being more vocal.
If you have ever watched a movie with a cat or used a cat app on your phone, cats will go wild trying to figure out why there is another cat in your phone or on your computer. They don't know the "voice". Moosey is a very*vocal cat, however, Zigs isn't, only when it is feeding time and she thinks I am moving too slow.