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The musical note that can trigger cold sweats and sightings of the dead

30 April 2022

9:00 AM

30 April 2022

9:00 AM

Everybody Hertz: The Amazing World of Frequency, from Bad Vibes to Good Vibrations Richard Mainwaring

Profile Books, pp.304, 16.99

Imagine that all the frequencies nature affords were laid out on an extended piano keyboard. Never mind that some waves are mechanical, propagated through air or some other fluid, and other waves are electro-magnetic and can pass through a vacuum. Lay them down together, and what do you get?

The startling answer is a surprisingly narrow piano.

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