I don't really think that consulting a doctor is a good idea. I can just imagine the look on doctor's face if I said "I have ear ringing when I attempt to leave my physical body". 
I have to admit though, that this ringing is actually kinda useful, as it tells me that I am getting close to a successfil projection. However, I am still a little bit usnure about it. If these sounds are physical, and I don't really believe that they aren't, then aren't they as likely to damage my hearing as any other loud noise?

I have to admit though, that this ringing is actually kinda useful, as it tells me that I am getting close to a successfil projection. However, I am still a little bit usnure about it. If these sounds are physical, and I don't really believe that they aren't, then aren't they as likely to damage my hearing as any other loud noise?