My 33 1/3 book, on Aphex Twin's Selected Ambient Works Volume II, was the 5th bestselling book in the series in 2014. It's available at Amazon (including Kindle) and via your local bookstore. • F.A.Q.Key Tags: #saw2for33third, #sound-art, #classical, #juntoElsewhere: Twitter, SoundCloud, Instagram

Listening to art.
Playing with audio.
Sounding out technology.
Composing in code.

Sound Ledger¹ (Mumbai, Speakers, Helicopters)

Audio culture by the numbers

100.7: The decibel level during festival season in 2020, Mumbai’s quietest in two decades

9.5: Estimated total sales (in billions of dollars) of speakers this year in China, the biggest market in the world

88,000: Roughly the number of helicopter flights between 2017 and 2019 in and around Washington, D.C.

▰ ▰ ▰

¹Footnotes: Mumbai: Speakers: Helicopters:

Originally published in the January 11, 2021, edition of the This Week in Sound email newsletter (

By Marc Weidenbaum

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