My sisters Lab has such a deep bark and it echoes. Definitely sounds like a "Coon" dog bark. Sounds like "woof," too me! Her Shepherd is very sweet and mostly whines (I LOVE that whine! lol). Her bark is very menicing but she is such a sweet thing!

The dog I used to have sounded like "Are-are-are," but when she got really going it was deep and sounded more like "Bar, bar, bar, barK"