As it’s been said, this depends on the individual; particularly how open and sensitive your psychic senses are to begin with. The first being I’ve ever heard audibly was goddess Aphrodite. This was during my second week of attempting evocations. I also heard Archangel Gabriel speak to me that same week but could not make out what he said. His voice had too much static.
I’ve had entities speak through EA in my dreams, and even other practitioners I’m familiar with. I say that to say sonetimes spirits try to get the message to you the best way they see fit. For me currently it’s through my dreams, or that half sleep state; until I sharpen my other senses. So, they could be speaking to you in ways you aren’t even aware of yet (like omens).