3000: Total number of individual tourists allowed each year at Kronotsky Nature Reserve on the Russian coast
30.6: Decline, in decibels, of noise pollution in Mumbai, India, between 2015 and 2021
30: Rough estimate, in millions of U.S. dollars, to treat “Havana syndrome,” allocated out of a $768 billion defense spending bill signed into law by President Joe Biden
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¹Footnotes: Russia: [thetravel.com](https://www.thetravel.com/quietest-most-peaceful-no-noise-destinations-on-earth/). Mumbai: [indiatimes.com](https://timesofindia.indiatimes.com/blogs/voices/mumbai-witnessing-steady-decline-in-festival-noise/). Havana: [fastcompany.com](https://www.fastcompany.com/90709814/bidens-defense-bill-includes-30-million-to-support-havana-syndrome-victims).
Update: I accidentally left out the word “millions” in the Havana entry when I first published this. And I added the word “allocated” for clarification.
*Originally published in the January 3, 2022, edition of the This Week in Sound email newsletter ([tinyletter.com/disquiet](https://tinyletter.com/disquiet)).*