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.
Loud music on headphones has the same effect on nerves as multiple sclerosis and causes hearing loss. Loud music played on earphones causes hearing loss by having a similar effect on nerves as multiple sclerosis, research finds. The research shows that noise levels above 110 decibels strip insulation from nerve fibers carrying signals from the ear to the brain.