Many high decibel working environments seriously affect the hearing safety of workers, so operators should make reasonable choices according to the actual site environment. Guaranteed sound insulation earmuffs can reduce the possibility of damage to operators' hearing. Sound insulation earmuffs can be classified into independent sound insulation earmuffs and sound insulation earmuffs with hard hats according to their appearance. Sound insulation earmuff is a product that can significantly reduce noise and effectively protect ears from hearing. It is widely used in factories, airports and other places with strong noise.