What the constant sound of modern life is doing to our minds

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For most of human existence, listening was closely tied to moments that carried meaning, emotion or survival. Nature supplied the backdrop – wind, water, animals – and music surfaced in hunting rituals, healing ceremonies and communal celebrations.

That balance began to shift with the industrial revolution, and the arrival of many loud, unnatural sounds. Today, many people move through the day with a near-constant stream of sounds: playlists for work, ambient study tracks...