A:AnswerThe headphones use the SoundLink® around-ear wireless headphones II ear cushion kit. You can contact Bose Support for help in getting replacement ear cushions if needed.
A:AnswerNot really, I suffer from mild tinnitus. If you are listening to music, or something, of course it will drown out the riniging. But, if the sound is low, and you listen closely, you will still hear it.
A:AnswerThat sounds more like a phone related issue.
You may want to consider your do-not-disturb settings in your phone.
I don't know any headset device that only allows for specific functions.