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Figure 3 Experiment design: First the samples are stimulated for a period of 30min until they reach a steady state. Then the CF and CD are measured over a period of 10 min (CF1 and CD1). Infrasound is applied for a period of 60 min during the continuous electrical stimulation to only one of the two samples. The second one serves as a control. At the end, the measurement is repeated over a further period of 10 min (CF2 and CD2). Lastly, the relative changes (CF% and CD%, the ratio between the values after the treatment and before) are calculated for both the test and control samples.

Figure 3 Experiment design: First the samples are stimulated for a period of 30min until they reach a steady state. Then the CF and CD are measured over a period of 10 min (CF<sub>1</sub> and CD<sub>1</sub>). Infrasound is applied for a period of 60 min during the continuous electrical stimulation to only one of the two samples. The second one serves as a control. At the end, the measurement is repeated over a further period of 10 min (CF<sub>2</sub> and CD<sub>2</sub>). Lastly, the relative changes (CF<sub>%</sub> and CD<sub>%</sub>, the ratio between the values after the treatment and before) are calculated for both the test and control samples.