80,000: cost in $US of four LRADs (long-range acoustic devices) purchased by the Austin, Texas, police department between 2011 and 2016
1743: the year Jean-Antoine Nollet, French Catholic abbot and scientist, “confirmed that sound carried in water”
100: more than that number of U.S. cities “have put some restriction on gas-powered leaf blowers”
Originally published in the August 1, 2022, edition of the This Week in Sound email newsletter. Get it in your inbox via tinyletter.com/disquiet.