That earplugs as noise reduction equipment. It works by reducing sound levels. Our ears can hear the environment. Unaffected by nerve get. In a noisy environment.
The inability of the ear is a sound device, which works by reducing the sound level picked up the men, we can hear the environment without affect the nervous listening in noisy environments.
ear-plug is a device which reduces noise by reducing the noise level in the ears of the people, we were able to hear the sound surrounded by listening without prejudice to nerve in a noisy environment