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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

Case N Inviscid \(h (\delta h) (\mu\)m) Viscous \(h (\delta h)(\mu\)m)
3 (HF) 35 5 (4) 26 (21)
5 (H) 16 69 (93) 44 (36)
6a (AF\(+\)H) 4 65 (60) 36 (25)
6b (AF) 3 4 (4) 22 (12)
Total, r (\(\delta r\)) 58 0.984 (0.002) 0.969 (0.003)
Total, \(\Delta t\) (ms) 58 \(2.4 \pm 2.4\) \(1.2 \pm 1.0\)