  Neutrino oscillation is visualized as coupled vibrations. Unlike existing
models describing neutrino oscillations, our model involving a single
fundamental mass parameter $m$ and first discussed in the context of a possible
boson oscillation demonstrates that for a self consistent theory there should
be three types of bosons paired with maximal mixing. The argument is easily
extended to neutrinos (fermions) with the exception that in the case of boson
oscillation means periodic variation of particle number, whereas in the case of
fermions the particle number does not change, only the mass oscillates. The
fermionic vacuum is not really empty but filled with zero energy fermions. The
oscillation length calculated perturbatively conforms to the experimental
findings. Also there is no fermionic number violation in our model.
