Supplementary material S13: Petri-dish jolting pulse spectra.

<p>Jolting pulse spectra on the petri-dish substrate. The magnitude of acceleration is logarithmic (to the power 10) where the highest magnitude (dark red) is 6.1x10^-4m/s² and the lowest magnitude (dark blue) is forced to be 1/50 of the maximum to reduce the contribution of meaningless noise. All pulses have been high pass filtered at 300 Hz to remove background noise without interfering with the frequency range where signal originating from the <em>Varroa </em>pulse is seen.&nbsp;</p>