1. Tinnitus | American Academy of Otolaryngology-Head and ...
2. Tinnitus Causes - Diseases and Conditions - Mayo Clinic
Tinnitus:
Head noise (tinnitus) can be caused by broken or damaged hairs on auditory cells, turbulence in a carotid artery or jugular vein, temporomandibular joint (TMJ) issues, and problems in the auditory processing pathways of the brain.
3. Ear Ringing or Buzzing - The Merck Manuals