Noise Pollution

Traveling by train is an adventure.  Today I observed 2 girls conversing in the sign language as they were dumb and deaf.  Made me realize about SOUND pollution.  Mumbai is a city filled with noise.  The train is one of the best examples, especially the ladies compartment.   Admit we are a over populated city, but can we not hear ourselves.  The amount of noise we make.  Do we need to be a people with no consideration for nature.