Neuromod or also known as mute button will launch next year in Ireland I believe. You can search up on the mute button thread.
It helps to reduce tinnitus levels. Also, there’s many trials happening, perhaps he can join a trial or at least have hope of a future cure.
https://www.tinnitustalk.com/threads/tinnitus-week-2018-what-advice-would-you-give-to-someone-else-who-has-tinnitus.26850/#post-307822
If his T wasn't a result of noise, then it could be related to TMJ (problem with the jaw). If this is the case, treating TMJ can actually cure his tinnitus.
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