Complex sentence: In August 2006, Hatchman broke the Guinness World Record, as the'Loudest Drummer in the World'--the sound of his acoustic drums being played was measured at 137.2 dBA.
Split into simpler sentences: In August 2006, Hatchman broke the Guinness World Record, for the "Loudest Drummer In The World". The sound of his acoustic drums being played was measured at 137.2 dBA.