  Quantum aspects of black holes may have observational imprints on their
absorption and emission spectrum. In this work, we consider the possibility of
non-uniform area quantization and its effects on the phasing of gravitational
waveform from coalescing black hole inspirals. These observations may provide
detectable effects distinct from that of a uniform area quantization and allow
us to put bounds on various parameters of the underlying model. Our work can
also be regarded as a novel test for the area-entropy proportionality of black
hole solutions in general relativity.
