Shepard Tone Listen to the sequence of tones. Maybe adjust vo | What Do You Sea
Shepard Tone
Listen to the sequence of tones. Maybe adjust volume. The tone rises in pitch from step to step – and continues to do so, endlessly. Really? That’s impossible…
Roger Shepard invented this acoustic illusion in 1964. His basic idea was as follows: When the pitch rises one step, the harmonic composition is altered (a little less high, a little more low harmonics). This is done in such a way that after 11 steps the harmonic content corresponds nearly to a tone one octave lower. With the next step the sequence resorts to the first one.
