Shepard demonstrated a pitch illusion likened to Escher’s endless staircase

Evidence

A pitch illusion, which has been compared with the continuous staircase pictures of M. C. Escher, has been demonstrated by Shepard (1964) and is often referred to as a FIGURE 5. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1639

Categorization

• QUESTION: The excerpt cuts off mid-sentence at ‘often referred to as a’ — need the next paragraph to name the Shepard tone itself.
• XREF: connects to: A Shepard tone creates an endlessly ascending pitch while staying within one octave; Shepard tones create endlessly rising pitch through shifting autocorrelation peaks — Eric J. Heller, Why You Hear What You Hear- An…, 2121

Broader Connections

• A Shepard tone creates an endlessly ascending pitch while staying within one octave #expands (1.00)
• Shepard tones create endlessly rising pitch through shifting autocorrelation peaks #expands (1.00) — Eric J. Heller, Why You Hear What You Hear- An…, 2121