Deep throat

The phone rings and I answer to this:

-You have a great voice.
-Huh?
-Do you remember that old radio person named Dusty? Your voice sounds just like that. Awesome.
-No, must have been before my time. Thanks though.
-What's your name?
-Susan.
-Hi, Susan. I'm Marty.
-How do you do that?
-What do you mean?
-Make your voice sound like that.
-I don't know. I'm not trying all that hard.
-Anyhow, can you give me the phone number for the Marin office?
-Sure. Just a second. [blah blah blah]
-Thanks.
-Keep that up. It's awesome.
-Thanks. Have a great afternoon.