Pinhead sorry to hear your story i have dysacusis as well with loudness hyperacusis(mild thankfully) and severe tinnitus in right ear i am so scared of dysacusis to be honest. and i feel like its getting worse i was only getting them on top of shower and ac fans now over Tv aswell what caused your tinnitus and dysacusis may i ask? Mine is caused by steroid injections from my arm.
My opinion is that Masking when Tinnitus is very loud only worsens it , using sound therapy to mask over very loud T isn't something I would do . I'm nobody to give anybody advice but using loud sounds to mask loud Tinnitus dont make sense to me that can damage hearing further .