She didn't care if the man had heard her or not.

About half the men in the room heard those words.

He had no idea if the man heard him or not.

The man must have heard something he had not said.

He was far enough away so the men couldn't hear.

She called out, but the man did not hear her.

Then he moved, and the man heard the door open.

So the man could hear that too, when he wanted to.

The other men could hear his voice from the hall outside.

The men had heard the news, and were talking it over.