  We investigate the massless scalar field perturbations, including the
quasinormal mode spectrum and the ringdown waveform, of a regular black hole
spacetime that was derived via the Loop Quantum Gravity inspired polymer
quantization of spherical $4$D black holes. In contrast to most, if not all, of
the other regular black holes considered in the literature, the resulting
nonsingular spacetime has a single bifurcative horizon and hence no mass
inflation. In the interior, the areal radius decreases to a minimum given by
the Polymerization constant, $k$, and then re-expands into a Kantowski-Sachs
universe. We find indications that this black hole model is stable against
small scalar perturbations. We also show that an increase in the magnitude of
$k$ will decrease the height of the QNM potential and gives oscillations with
lower frequency and less damping.
