Sonagraphe

Rarity: Common

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What Wikipedia says

Un sonagraphe est un instrument permettant de représenter les sons sur un diagramme appelé sonagramme, où l'axe horizontal représente le temps, l'axe vertical des fines bandes de fréquence, et la couleur la puissance.

Excerpt from the Wikipedia article “Sonagraphe”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Maxime Metzmacher, CC BY-SA 3.0, via Wikimedia Commons.