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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Respir Physiol Neurobiol. 2008 Nov 1;165(1):82–89. doi: 10.1016/j.resp.2008.10.015

Figure 3.

Figure 3

Left panel: mean value ± SD of the noise limit during unloaded breathing (control), threshold loading and resistive loading. There was no significant difference between the three conditions (ANOVA, p=0.87). Right panel: mean value ± SD of the noise limit during room air breathing (control) and breathing a gas mixture of 7%CO2–93%O2 (7%CO2). * indicates a significant difference (t-test, p=0.0108).