Also contains definition of: humming gel
with energy dissipation in the acoustic frequency range.
A ringing gel
is often a hydrogel
with a surfactant as a third component and has a composition within an isotropic
one-phase region of its ternary phase diagram.
PAC, 2007, 79, 1801
(Definitions of terms relating to the structure and processing of sols, gels, networks,
and inorganic-organic hybrid materials (IUPAC Recommendations 2007))
on page 1808