What Is a Shepard Tone?
A Shepard tone is an auditory illusion of a sound that appears to rise or fall in pitch endlessly without ever getting higher or lower. Created by layering octave-spaced tones that fade in and out as they move, it was described by cognitive scientist Roger Shepard in 1964.
Shepard Tone in Practice
Because the ear never finds a resolution, a Shepard tone creates continuously mounting tension, which makes it a favourite device in film scoring and sound design. Hans Zimmer built his score for Christopher Nolan’s Dunkirk (2017) around the illusion, weaving endlessly rising figures with the recorded tick of Nolan’s own pocket watch so the tension never releases across the film’s interlocking timelines. The same principle appears in trailers, game audio and even vehicle sound design, where rising loops signal acceleration. For brands, it is a reminder that psychoacoustics can do emotional work no lyric or image can: the right sonic illusion keeps an audience leaning forward without knowing why.
Famous Example
Hans Zimmer’s Dunkirk score, built on an endlessly rising Shepard tone and a ticking watch.
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- Shepard Tone
- Skeuomorphic Sound
- Sonic
- Sonic Audit
- Sonic Brand Guidelines
- Sonic Branding
- Sonic DNA
- Sonic Identity
- Sonic Logo
- Sonic Palette
- Sonification
- Sound Branding
- Sound Design
- Sound Effect (SFX)
- Sound Symbolism
- Sound Trademark
- Sound-alike
- Soundscape
- Spatial Audio
- Startup Sound
- Stem
- Sting
- Sung Slogan
- Sync Licensing
- Synthetic Voice
A memorable jingle is one tool within a brand’s wider sonic branding.
