ASA 20 - Virtual Pitch


A complex tone consisting of 10 harmonics of 200 Hz having equal amplitude is presented, first with all harmonics, then without the fundamental, then without the two lowest harmonics, etc. Low-frequency noise (300-Hz lowpass, -10 dB) is included to mask a 200-Hz difference tone that might be generated due to distortion in playback equipment.


.J.M.Houtsma and J.L.Goldstein (1972), "The central origin of the pitch of complex tones: evidence from musical interval recognition," J. Acoust. Soc. Am. 51, 520-529.

J.F.Schouten (1940), "The perception of subjective tones," Proc. Kon. Ned. Akad. Wetenschap 41, 1086-1093.

A.Seebeck (1841), "Beobachtungen uber einige Bedingungen der Entstehung von Tonen," Ann. Phys. Chem. 53, 417-436.

Time Delay


You will hear a complex tone with 10 harmonics, first complete and then with the lower harmonics successively removed. Does the pitch of the complex change? The demonstration is repeated once.