  In this paper, we investigate the quasinormal mode (QNM) spectra for scalar
perturbation over a quantum-corrected black hole (BH). The fundamental modes of
this quantum-corrected BH exhibit two key properties. Firstly, there is a
non-monotonic behavior concerning the quantum-corrected parameter for zero
multipole number. Secondly, the quantum gravity effects result in slower decay
modes. For higher overtones, a significant deviation becomes evident between
the quasinormal frequencies (QNFs) of the quantum-corrected and Schwarzschild
BHs. The intervention of quantum gravity corrections induces a significant
outburst of overtones. This outburst of these overtones can be attributed to
the distinctions near the event horizons between the Schwarzschild and
quantum-corrected BHs. Therefore, overtones can serve as a means to probe
physical phenomena or disparities in the vicinity of the event horizon.
