why cant we close our ears the way we can close our eyes?

our world seems to be ignorant of the value of silence. i remember that i was happy to hear that there was such a thing called "noise pollution". we live in a noisy world filled with noisy people composed of noisy individuals owning and/or operating and/or using noisy products and inanimate objects. the everyday noise stresses me out to the point that i even avoid conversations just to minimize the noise im bombarded with everyday. sometimes i wish to hear the deafening sound of silence, which happens very rarely. i dont even hear it at night. in this world that never stops buzzing, all i want is half an hour of dead silence. at least. but i dont want to go deaf of course. even the library isnt as quiet as it should be.