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Perceptual impression of room impulse responses simulated by CE-FDTD method

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The room impulse response (RIR) is widely used to represent arbitrary fields. While the RIR is conventionally measured in real space, the development of sound field simulation has enabled calculation of the RIR from the room geometry. The Finite Difference Time Domain (FDTD) method has been used to analyze and synthesize sound fields. In particular, the Compact Explicit (CE) -FDTD method has improved the FDTD method to calculate the full-band acoustic signals. However, there is no study to evaluate the impression of RIRs simulated by the CE-FDTD method for a real space. We conducted subjective evaluation experiments on acoustic signals convolved with the simulated RIR and on acoustic signals captured in the real space. It is confirmed that the simulated RIR presents natural impression for narrow-bandwidth acoustic signals without transient sounds.

Express Paper 129; AES Convention 155; October 2023
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