Stephen Loftus
From Halopedia, the Halo wiki
Stephen Loftus is a scale-modeling hobbyist known for his detailed work on scale comparison on the Halo universe. He assisted 343 Industries in the production of Halo: The Essential Visual Guide. He goes by the username "SoundEffect" on halo.bungie.org and ScaleMaster117 on Halopedia.
Background
Loftus has been into scale modeling since 1985, focusing on ships and objects from sci-fi medium such as Star Trek, Star Wars and Gundam.[1] He founded and maintained the Maritime Science Fiction Modelers, a website formed in 1993 that is dedicated for sci-fi scale-modeling hobbyist, as a result of his invested interest in scale-modeling.
Since the release of Halo: Combat Evolved, Loftus has been producing detailed analysis on the Halo universe, focusing on the technical specifications of the technology, ships and weapons.