The condition can be fatal if left untreated, but the tetanus vaccine and improvements in treatment mean deaths from tetanus are now very rare in the UK. In 2013, there were only seven recorded cases of tetanus in England and Wales, and no deaths.
Sound pressure is measured in decibels (dB). Like a temperature scale, the decibel scale goes below zero. The average person can hear sounds down to about 0 dB, the level of rustling leaves. Some people with very good hearing can hear sounds down to -15 dB. If a sound reaches 85 dB or stronger, it can cause permanent damage to your hearing. The amount of time you listen to a sound affects how much damage it will cause.
Bleeding or fluid discharge from the ear canal. Ringing noise in the ear. The level of hearing loss depends on the size of the perforation and what caused it. Trauma to the ear or head can injure the middle ear, inner ear or both, and can cause severe hearing loss. If an explosion has torn the eardrum, you may have ringing in your ears (tinnitus) for several days, as well as hearing loss. If the perforated eardrum becomes infected, the hearing loss may worsen.