Table 1 Film thickness h (standard deviation \(\delta h\)) calculated by fitting \(R_{\mathrm{a}}(t)\) (\(\phi = 0.4\) suspension) to inviscid and viscous models. HF : high-frequency wave; H : Helmholtz resonance; AF : air flow; N: number of runs used; r : correlation coefficient (standard deviation \(\delta r\)); \(\Delta t\) : Time span used for the fit. In terms of N, the inviscid model gives a higher r for 69 % of the runs

From: Excitation of airwaves by bubble bursting in suspensions : regime transitions and implications for basaltic volcanic eruptions