Answer;
loud noise that damages hair cells
One of the leading causes of permanent damage leading to hearing impairment is loud noise that damages hair cells.
Step-by-step explanation;
- Loud noise is the among the leading cause of permanent damage of the ear which impairs hearing.
- Loud noise may cause damage to the cells and the membranes in the cochlea of the ear. Listening to loud noise for a very long time overworks the hair cells that may make them to die.
- The damage to the cochlea of the ear causes permanent hearing loss since all or part of the inner ear has been damaged.