  The equations of a resonant sphere in interaction with $N$ secondary radial
oscillators (transducers) on its surface have been found in the context of
Lagrangian formalism. It has been shown the possibility to exert a veto against
spurious events measuring the longitudinal component of a signal. Numerical
simulations has been performed, which take into account thermal noise between
resonators and the sphere surface, for a particular configuration of the
transducers.
