Roughly 50 million people in the USA experience tinnitus at some point in their lives, with two to three million so severely affected that their ability to function is greatly impaired (Shargorodsky et al.
2010). Defined as auditory perceptions not produced by external sound (Baguley
2002), tinnitus and its treatment have become the focus of much recent interest. This is partly because it is the most common service-related disability for veterans returning from military service (Department of Veterans Affairs
2010). As tinnitus is a multimodal disorder with many potential causes, it is a challenge to treat, and current interventions often result in limited levels of success (Meikle et al.
2007). …
