Simulating room acoustics using numerical methods for solving the underlying wave equation yields accurate results, but becomes intractable for higher frequencies due to expensive computations. On the contrary, geometrical acoustics methods are efficient but are only considered accurate well above the Schroeder frequency. By combining the two methods, the full human auditory frequency range can be modeled, but two main question remains: how should the cross-over frequency between the two methods be determined and how do the room conditions influence the result? In this work, we investigate the ability of the geometrical methods to capture the underlying physics in various room conditions, translating into a lower frequency bound determining the cross-over frequency. A listening test is planned, where the cross-over frequency is determined when the sound field becomes perceptual similar enough as the objective pressures get closer to each other. In this talk, preliminary results will be presented including listening examples, so please bring your headphones!

You can listen to the audio results here: https://dtu-act.github.io/jnd-crossover-freq/