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. 2008 Aug;124(2):1207–1219. doi: 10.1121/1.2946715

Figure 9.

Figure 9

(a) Comparisons of the sinusoidal force amplitude (system signal level) for the ANSI S2.21 standard polymer material (n=3) to the force amplitude without any specimen (system noise level from three trials) in the frequency range of 1–300 Hz (means±standard deviations). The system noise level remains much lower than the signal level across all frequencies. (b) Comparisons of the sinusoidal force amplitude (system signal level) for the human vocal fold cover (n=7) to the system noise level (from three trials) in the frequency range of 1–300 Hz (means±standard deviations). The system noise level remains about one standard deviation lower than the signal level at frequencies of up to around 275 Hz.