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He started looking up companies in the phone book and putting on a deep voice.

At the same time, a deep voice came from behind her.

It could have been a woman with a deep voice.

A moment later a deep voice was on the other end of the line.

A deep male voice asked a question I didn't catch.

You're thinking about her as if she's real, the deep voice said.

"You will have to get one of your own some day," I heard him say in his deep voice.

His deep voice made it a statement rather than a question.

She appears to be their leader, and has a deep voice.

A deep and very clear voice came from the other end.