To have a dream with no sound represents your awareness of yourself experiencing a situation where it's difficult to sense or intuitively feel everything that is going on. Lacking a full understanding of someone else's true feelings. Situations where you feel you need to make decisions without a full understanding of the reality of a situation.
Example: A man dreamed of seeing a police officer taking to people, but he couldn't hear anything. There was no sound. In waking life he was experiencing a problem with an angry stalker who was being investigated by the police. He didn't want to communicate to the stalker or police so he had to sense what the police were doing to the stalker by observing changes in the stalkers behavior.
*Please See Quiet