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Tinnitus (ringing, buzzing or hissing in the ears) that occurs for only a short time after exposure to high noise levels is an early warning sign that your hearing is at risk and you may have suffered some permanent loss of hearing acuity.
Tinnitus: people with tinnitus hear a constant ringing or roaring sound. The cause of this ringing cannot always be found. Some cases of tinnitus are caused by ear wax, ear infections or a reaction to antibiotics, but there are many other possible causes of this disorder.