  We investigate the behavior of the regular modified gravity (MOG) static
spherically symmetric black hole (BH) under massless scalar perturbation,
gravitational perturbation, and massless Dirac perturbation. The dimensionless
parameter $\left( \alpha \right) $ distinguishes this BH from a Schwarzschild
BH. We derive the effective potential equations for three perturbations in the
regular MOG BH. Using the derived potentials, we calculate the bounds of
greybody factors (GFs). Next, we investigate the quasinormal mode (QNM) of the
MOG BH by implementing the WKB method of sixth order. By analyzing the
influence of the MOG parameter $\alpha $ for the BH we study on GF and QNM, we
found that as $\alpha $ increases, the GFs increase proportionally. However,
both gravitational wave oscillation frequency and damping decrease as $\alpha $
increases. Moreover, we examine the behavior of QNMs by considering how their
frequency changes with the shape of potentials. As a result, we found that the
frequency behavior is like the quantum mechanical one. The faster the wave
decays, the larger the potential.
