Why is that? Perhaps because being in nature, surrounded by pure acoustics of the environment, gives a feeling of overwhelming calm that is hard to experience in urban surroundings. Probably that is related to a human brain reacting positively when exposed to nature sounds. Actually, nature is our ancient environment, so the emotions it produces in our brain with its sounds are among most pleasurable and feels somewhat like “returning home”. So being in nature or listening to relaxing nature sounds can be a great stress relief for the brain, since it is basically coded and shaped at times deep in prehistory when human communities were living in an environment of such sounds.