On the radial mode in bubble lattices

The radial mode resonance frequency and quality factor behavior in general bubble lattices is studied. Results of direct calculations for the triangular lattice withl/z = 0.25are given and discussed in connection with the findings of Kaczér and Tomás. An alternative scheme allowing a calculation of the reduced frequency and quality factor on the basis of the static bubble radius field-dependence is also shown. Finally, an estimate is made of the expected frequencies and quality factors in a representative material.