How are workers in noise factories survive the noise?

Answer:
Today, they wear "ear muffs" that cut about 90% of the noise. In this day and age, it is required by law. Note that I am speakng of well -developed countries here. In foundries in countries known more for "sweatshops", noise pollution in the workplace is still probably a severe problem.
First answer by Melos Antropon. Last edit by Melos Antropon. Contributor trust: 188 [recommend contributor recommended]. Question popularity: 1 [recommend question].