  In nuclear matter at neutron-star densities and temperatures, Cooper pairing
leads to the formation of a gap in the nucleon excitation spectra resulting in
exponentially strong Boltzmann suppression of many transport coefficients.
Previous calculations have shown evidence that density oscillations of
sufficiently large amplitude can overcome this suppression for flavor-changing
$\beta$ processes, via the mechanism of "gap bridging". We address the
simplifications made in that initial work, and show that gap bridging can
counteract Boltzmann suppression of neutrino emissivity for the realistic case
of modified Urca processes in matter with $^3P_2$ neutron pairing.
