Quiet Manhwa/manhua/manga

I was reading a manhwa today and it felt too quiet, like there was no sound effects or voice talking (the characters, I am not insane). It felt weird so I didn't continue reading it. I didn't have this problem when I was reading another story so it made me think "huh?". Like what was that, why did my brain suddenly become quite. Am I the only? Because when I read a story it would be a given that I imagine them moving and hearing character's made up voice in my head. Why would it suddenly become quiet?