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Exceptional points (EPs) have been widely studied in quantum mechanics,condensed matter physics, optics and photonics. However, their potential inacoustics has only recently been recognized due to the rapid development ofacoustic metamaterials. This paper proposes a method for achieving EPconditions in acoustic resonators by lowering their symmetry and enablingresonant mode interaction. The formation of EPs is predicted through directnumerical simulation supported by coupled mode theory and resonant stateexpansion. These findings have significant implications for the design andoptimization of acoustic metamaterials for applications such as acousticsensing and noise reduction.

Exceptional points in single open acoustic resonator due to the symmetry breaking