**75:** Cost in $US of a tuning fork from Marie Kondo’s online store. Crystal included.
**18:** Number of fewer decibels produced by owls than by other birds when flying at similar speed.
**5,500,000:** Estimated number of Parisians exposed to road noise 55 dB or higher, the largest of any European city. London came in a distant second at roughly 2,647,600.
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¹Footnotes: Kondo: [konmari.com](https://konmari.com/how-to-use-a-tuning-fork/). Owls: [sciencefocus.com](https://www.sciencefocus.com/future-technology/owl-inspired-technology-may-reduce-noise-pollution/). Paris: [swlondoner.co.uk](https://www.swlondoner.co.uk/news/21012022-londoners-exposed-to-the-second-most-road-traffic-noise-in-europe/).
*Originally published in the January 24, 2022, edition of the This Week in Sound email newsletter [tinyletter.com/disquiet](https://tinyletter.com/disquiet).*