Amplitude modulation faster than the tone’s own steady pitch is heard as pitch change

Evidence

There is another way to check the model: listening to an 80-dB, I-kHz tone that is modulated only little above its threshold amplitude modulation, one hears that the amplitude modulation leads to a fluctuation of the sensation that corresponds only to a higher pitch. That part of the sensation that corresponds to the pitch of the tone itself remains constant and does not fluctuate. The model was created in this way, i.e., by sitting in the booth, listening as much as possible in detail and thinking about the detail’s meaning. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1138

Categorization

• CANDY: A neat everyday-audible phenomenon: a close-to-threshold modulated 1-kHz tone shifts in apparent pitch while its own note stays steady.