Could a Tongue-Zapping device silence ringing ears?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18 years and over at time of consent * Ability to read and understand English * Willing and able to provide and understand informed consent * Willing to commit to the full duration of the investigation * Subjective tinnitus * Tinnitus duration of greater than or equal to 3 months and less than or equal to 20 years at time of consent * Baseline Tinnitus Handicap Inventory (THI) score from 38 to 100 * Access to reliable internet connection and device to complete virtual video visits and electronic surveys * Tonal tinnitus that can be matched Exclusion Criteria: * Subjective tinnitus, where pulsatility is the dominant feature * Objective tinnitus * Middle ear pathology in either ear including documented/known conductive hearing loss \>= 20 dB at three adjacent frequencies or if a diagnosis of a tympanic membrane perforation or other middle ear pathology has been rendered, if there is an indwelling pressure equalization tube by patient report, or if middle ear surgery has been performed. * Began wearing hearing aids within the past 3 months * Hearing loss of greater than 80 dB HL in any test frequency in the set {2k,3k,4k,6k,8k} Hz or greater than 40 dB HL in the set {250,500,1k} Hz either unilaterally or bilaterally * Health care provider has rendered a diagnosis of Meniere's disease or other disorder with fluctuating hearing loss * A diagnosis of hyperacusis, misophonia or hypersensitivity to loud noises has been rendered * History of auditory hallucinations * Tumor on the hearing or balance nervous systems * Hospitalization, or visit to a physician, for a head or neck injury, including whiplash, in the previous 12 months * Initiated new prescription medications or medical treatments in the previous 3 months that may impact the outcomes of the investigation, based on class of medication: antidepressants, anticonvulsants, neuroleptics and opioid analgesics. See Appendix 2 for a list of medical treatments. * Ceased prescription medications or medical treatments in the previous 3 months that may impact the outcomes of the investigation, based on class of medication: antidepressants, anticonvulsants, neuroleptics and opioid analgesics. See Appendix 2 for a list of medical treatments. * Changed dosage of prescription medications in the previous 3 months that may impact the outcomes of the investigation, based on class of medication: antidepressants, anticonvulsants, neuroleptics and opioid analgesics. See Appendix 2 for a list of medical treatments. * Any use of benzodiazepines or sedative hypnotics (either regularly or on demand) * Neurological condition that may lead to seizures or loss of consciousness (e.g., epilepsy) * Participant with a pacemaker or other electro-active implanted device * Participant previously diagnosed with psychosis or schizophrenia * Participants diagnosed with Burning Mouth Syndrome * A diagnosis of bothersome temporomandibular joint disorder (TMJ) has been rendered * Previous involvement in a clinical investigation for tinnitus treatment within the previous 3 months or had an implantable or surgical intervention for tinnitus * Inability to physically or comprehensively use the device * Oral piercings that cannot or will not be removed * Pregnancy per patient report * Prisoner * Principal Investigator (PI) does not deem the candidate to be suitable for the investigation for other reasons not listed above. Rationale must be provided.