• Tinnitus of at least a moderate severity as defined by a score of ≥ 25 points or higher on the Tinnitus Functional Index (TFI) questionnaire associated with one or more of the following:

‣ Blast- or noise exposure

⁃ Traumatic brain injury (TBI) and/or concussion diagnosed by a health care provider.

• Able to provide written informed consent.

• Age: Minimum 18 years of age at the time of enrollment.

• Other concurrent treatments for tinnitus: A four-week washout from any other tinnitus treatment or management program is required prior to entering this study.

• a) Hearing aids are permitted if the participant has been wearing them for at least 4 weeks.

• Hearing function: All degrees of hearing function can be included, recognizing that individuals with profound, bilateral hearing loss will not be able to perform tinnitus evaluations and hearing tests but will be able to rate subjective tinnitus loudness, annoyance and impact on life. This is an important sub-population because of the challenges in treating them with acoustic therapy and the need for a medical intervention.

• Additional tinnitus characteristics:

• a) Tinnitus history: Onset associated with blast and/or noise exposure or associated with diagnosed TBI and/or concussion. Subjects will have blast exposure, noise exposure, traumatic brain injury (TBI), and/or concussion impact, defined as exposure/impact less than or longer than six months at time of enrollment.

• i. Participants enrolled with tinnitus associated with TBI and/or concussion must have received a diagnosis of TBI and/or concussion by a health care provider.

• b) Stability: Constant (not pulsatile or intermittent). c) Location of tinnitus perception: Unrestricted. Tinnitus may be unilateral, bilateral, or perceived in the head.