A reverberation chamber is a widely used type of a laboratory room for widespread usage of standards like a ISO 354, ISO 17497-1 or ISO 3741. Chambers' shapes and types vary a lot around the world and so do the results of the sound absorption coefficient measurements, even though they meet the standard criteria. Verification of the ISO standards parameters is required, also introducing extra parameters describing the level of sound field diffuseness. Model studies have been conducted using the ray-tracing method in order to verify the level of sound field diffuseness in varying versions of irregular reverberation chamber, further rated with kurtosis of room normalized impulse response and sound field diffuseness coefficient, in order to assess the geometries under study.
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