Organ builders exploit missing-fundamental perception to create bass notes no pipe actually sounds

Evidence

When the two pure tone frequencies are both themselves adjacent har­ monics of some f0 (in Example 5.2 the tones are the 11th and 12th har­ monics of 100 Hz), then the difference tone is equal to f0 and the other combination tones form “missing” members of the harmonic series. When the two tones are not members of a harmonic series, the combination tones have no equivalent f0, but they will be equally spaced in frequency. — David Howard, Jamie Angus, coustics and Psychoacoustics, 1620 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Adding a harmonic-reinforcing organ stop boosts all multiples of that harmonic; Combination tones fill in missing harmonics of a perceived fundamental — David Howard, Jamie Angus, coustics and Psychoacoustics, 1620; Listeners reconstruct a perceived pitch that is not physically present (+2 more)

Broader Connections

• Listeners reconstruct a perceived pitch that is not physically present #corroborates (0.90)
• Combination tones fill in missing harmonics of a perceived fundamental #corroborates (0.85) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1620
• Nonlinear cochlear mechanics make listeners perceive nonexistent difference tones #corroborates (0.85)