13: The disparity, in years, of life expectancy for individuals living in Denver, Colorado, based on where they live, due to factors including noise pollution.
14.4: The weight, in grams, of a tiny, wireless, battery-free device that can be implanted in songbirds to aid scientific study
184: The percentage increase in overall health of individuals exposed to the sounds of nature
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¹Footnotes: Denver: [denverite.com](https://denverite.com/2021/04/05/life-expectancy-in-denver-varies-by-as-much-as-13-years-depending-on-what-part-of-the-city-you-live-in/). Songbird: [nature.com](https://www.nature.com/articles/s41467-021-22138-8). Nature: [smithsonianmag.com](https://www.smithsonianmag.com/science-nature/why-listening-sounds-nature-can-be-restorative-180977397/).
*Originally published in the April 5, 2021, edition of the This Week in Sound email newsletter ([tinyletter.com/disquiet](https://tinyletter.com/disquiet)).*