Why sponge is a good ir for ear defenders?

Sponge is an Excellent material for ear defenders because it is lightweight, flexible, and provides effective sound absorption. Its porous structure helps to dampen noise by trapping sound waves, reducing overall sound transmission. Additionally, sponge can conform to the shape of the ear, ensuring a comfortable fit while enhancing noise isolation. This combination of comfort and acoustic properties makes sponge an ideal choice for ear defenders.