Table 1. Mean amplitude of the fundamental frequency (F₀) and second harmonic (H2) for each note for the first and last halves of the recording.

	Time Period (Half)	F0 Mean Amplitude (µV)	H2 Mean Amplitude (µV)
Note 1	First	0.041 (0.008)	0.016 (0.033)
	Last	0.046 (0.009)	0.020 (0.010)
Note 2	First	0.043 (0.010)	0.017 (0.007)
	Last	0.046 (0.012)	0.025 (0.006)
Note 3	First	0.025 (0.007)	0.015 (0.005)
	Last	0.023 (0.008)	0.017 (0.005)
Note 4	First	0.021 (0.005)	0.008 (0.004)
	Last	0.023 (0.012)	0.108 (0.005)

Standard deviations are reported in parentheses.