yes you can have many tinnitus tones - i did at the worst of it. some of it can even oscillate louder and quieter over and over while others are just a tone all at the same time
Yep, you can. My T changes almost everyday. Sometimes one sound at higher frequency, sometimes many across multiple frequencies from low to high. Usually acoustic incidences cause a temporary hum or whoosh over the top which almost feels like a physical sensation as opposed to just sound - like blood rushing or something.