Figure 1.
Percentage of the time each frequency resulted in the highest airflow (red bars) and volume (blue bars) with the sine waveform. The operational range of the sine waveform is 5 to 20 Hz.

Percentage of the time each frequency resulted in the highest airflow (red bars) and volume (blue bars) with the sine waveform. The operational range of the sine waveform is 5 to 20 Hz.

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