I also have a typewriter going on my left ear so I know how you feel. I am not getting enough sleep and fear that it will even get worse. Now it's limited to the time I spend in quiet environments. If I stuff wet cotton in my ear it does stop. Pressing really hard on the outer ear canal works too, but it does come back. See an ENT, I have an appointment in 2.5 weeks.
Hang in there. You can get help.
Franny