Shepard tone

Rarity: Common

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At a glance

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Notion

Domain

Science and technology

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What Wikipedia says

A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the bass pitch of the tone moving upward or downward, it is referred to as the Shepard scale.

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

Image: Grin, CC BY-SA 4.0, via Wikimedia Commons.