# Shepard tone

> English word · Noun

## Definitions
1. A superposition of sine waves, separated by an octave, whose relative amplitude may be varied to give the illusion of a rising or falling note.

## Etymology
For Roger Shepard, American scientist.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/shepard-tone