Soundwave is a character from the Transformers Generation 1 comic and cartoon made back in 1984. Soundwave serves under Megatron in Transformers canon as one of his main three officers, the other two being Starscream and Shockwave, heading communications, specifically.
In "The Courtship of Stewie's Father", it is revealed he works at the Pawtucket Brewery after Opie's promotion allows him to take his place. It is also revealed he has a human wife named Denise, and has three kids with her.