British scientists published a study about people 12 to 34 years old. The study said that more than 1 billion of them had hearing problems.
Many young people complain about nonstop ringing in their ears. Hearing tests show no problems, but when doctors repeat the test some years later, the hearing is worse. The main reasons are headphones, concerts, and restaurants where the sounds are too loud for too long. The sound damages the cells in the inner ear, and once this damage happens, you cannot change it.
Scientists say that the safe limit for our ears is 85 decibels over a 40-hour work week. 85 decibels is the sound of a blender, while 100 decibels is the sound of a train. We can also suddenly lose our hearing when we experience a very loud noise just once.