Abstract: A system for performing a silent fMRI scan is disclosed, providing scientists with the novel ability to detect tinnitus and measure tinnitus severity in a subject using a functional magnetic resonance imaging (fMRI) machine. The invention removes all air particles from an enclosed capsule via an air particle vacuum, providing the subject within the capsule's interior with a silent (i.e., zero decibel) fMRI scanning procedure. The subject within the capsule is provided with breathable air via a “scuba-like” breathing system connected to a non-magnetic tank containing purified compressed air. The invention's hemicylindrical design enables the retrofitting of the aforementioned enclosed capsule vacuum chamber onto any fMRI scanning bed without requiring assembly. An optional rebreather system providing breathable air to the subject during the fMRI scan is also disclosed.