This demonstration uses masking noise of high and low frequency to mask out, alternately, a melody carried by single pure tones of low frequency and the same melody resulting from the virtual pitch from groups of three tones of high frequency (4th, 5th, and 6th harmonics). The inability of the low-frequency noise to mask the virtual pitch in the same range points out the inadequacy of the place theory of pitch.
You will first her the familiar Westminster chime melody played with pairs of tones. The first tone of each pair is a sinusoid, the second a complex tone of the same pitch.
Now the pure-tone notes are masked with low-pass noise. You will still hear the pitches of the complex tone.
Pure tone notes are masked with low pass noise
Finally the complex tone is masked by high-pass noise. The pure-tone melody is still heard.
Complex tones are masked by high pass noise
