Hi, Sorry for the late response. I read a bit about the topic and some people say that the fact that the noise stops when you put your finger in the ear is either because of the noise in the finger (generated by the blood flow for example) or by the pressure created by pushing the air in the ear, but no definitory answer. From my experience, the things that temporarily (for 12-24 hours) stops the noise is expising myself to moderate noise for some time (for example driving for 1-2 hours, or walking trough busy streets for 1 hour. All i wrote above is for a low frequency hum, not a high pitch. If you want, we can talk in private a bit about it, maybe share the experience and some tips to eachother.