How Do Cicadas Make Noise? (In Slow Motion) - Smarter Every Day 299

A video on YouTube. In Science & Engineering, a Krater category.

Summary by Krater

The creator investigates the acoustic mechanism of cicada sound production, filming high-speed footage of cicada tymbals up to 110,000 frames per second to examine how they vibrate and buckle.

From the video

Answers: How do cicadas make such a loud sound?

cicada tymbal mechanics
high-speed photography
spectrum analysis
constructive interference in sound
cicada mating calls

What it concludes

Cicada sound is produced by the buckling and vibrating of a hollow structure in their abdomen called a tymbal.
Cicada tymbals buckle progressively on different strokes, which creates a much louder sound.
Cicada sound involves constructive interference caused by having a tymbal on each side of the hollow cavity abdomen.

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