This was listed under signs of health our ears tell us:
Ringing Ears
A persistent ringing, whistling, buzzing, chirping, hissing, humming, roaring or even shrieking noise in the ears is commonly associated with the condition tinnitus. According to the Harvard Medical School Harvard Health Publications, the sound can come from one ear or both, from inside the head, or from a distance. Short-lived tinnitus can be induced by attending a loud concert or sporting event. However, if the symptoms last more than six months, this is a sign of chronic tinnitus. This condition rarely means you are going deaf or have a more serious health problem.
Ringing Ears
A persistent ringing, whistling, buzzing, chirping, hissing, humming, roaring or even shrieking noise in the ears is commonly associated with the condition tinnitus. According to the Harvard Medical School Harvard Health Publications, the sound can come from one ear or both, from inside the head, or from a distance. Short-lived tinnitus can be induced by attending a loud concert or sporting event. However, if the symptoms last more than six months, this is a sign of chronic tinnitus. This condition rarely means you are going deaf or have a more serious health problem.