9: The number of seconds one can safely be exposed to 120 dB of sound, according to WHO (World Health Organization)
6: The number of noise-reduction microphones in the Anker Liberty Air 2 Pro earbuds, meaning just one more mic than there are words in the new product’s name
440 – 880: The range, in hertz, reportedly depicted in the new logo design for MIDI
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¹Footnotes: WHO: [unb.com.bd](https://unb.com.bd/category/Special/noise-pollution-even-the-pandemic-has-failed-to-quiet-dhaka/63826). Microphones: [cnet.com](https://www.cnet.com/pictures/best-new-headphones-of-ces-2021/). MIDI: [cdm.link](https://cdm.link/2021/01/midi-has-a-slick-new-brand-identity-courtesy-pentagram-in-time-for-2-0/).
*Originally published in the January 25, 2021, edition of the This Week in Sound email newsletter ([tinyletter.com/disquiet](https://tinyletter.com/disquiet)).*