## 1 Introduction
### Contribution  
This paper introduces RSoANU, the RIR dataset of a recording studio [21] at the School of Music, Australian National University (ANU). This studio features variable wall paneling with felt and wood options. The RIRs are recorded using both a 32-channel spherical microphone array and a B-format soundfield microphone array for two wall configurations, three source positions, and a 1 m \(\times\) 1 m receiver grid spanning a measurement region of dimensions 7 m \(\times\) 7 m. Additional receiver points with a finer grid spacing of 50 cm around each active source are also included. This dataset comprises 396 4-channel and 396 32-channel RIRs with metadata of Cartesian coordinates of source and receiver positions, wall panel setting, microphone device, temperature, and other signal parameters. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Name** & **\#RIRs** & **\#Rooms** & \begin{tabular}{c} **\#Source** \\ **Positions** \\ \end{tabular} & \begin{tabular}{c} **\#Receiver** \\ **Positions** \\ \end{tabular} & \begin{tabular}{c} **T\({}_{60}\) (s)** \\ \end{tabular} & \begin{tabular}{c} **Microphone** \\ \end{tabular} \\ \hline C4 DM [14] & \begin{tabular}{c} 468 \(\times\) 1, \\ 468 \(\times\) 4 \\ \end{tabular} & \(3\times 1\) & 1 & 130, 169 & 1.7–2.7 & Omnidirectional, B-format array \\ \hline Hadad [15] & \begin{tabular}{c} 234 \(\times\) 8 \\ \end{tabular} & \(1\times 3\) & 26 & 3 & 0.16–0.61 & 8-element linear array \\ \hline ACE [16] & \begin{tabular}{c} 14 \\ \(\times\) [2,3,5,8,32] \\ \end{tabular} & \(7\times 1\) & 1 & 2 & 0.34–1.25 & \begin{tabular}{c} \{2,3,5,8,32]-element arrays of different configurations \\ \end{tabular} \\ \hline \begin{tabular}{c} BUT \\ ReverDB [17] \\ \end{tabular} & \(1426\times 1\) & \(9\times 1\) & 3–10 & 31 & 0.59–1.85 & \begin{tabular}{c} 2-10 omnidirectional \\ microphones of \\ several mountings \\ \end{tabular} \\ \hline dEchorate [18] & \(60\times 30\) & \(1\times 10\) & 6 & 1 & 0.18–0.75 & \begin{tabular}{c} 6 5-element \\ linear array \\ \end{tabular} \\ \hline MeshRIR [19] & \begin{tabular}{c} 3969 \(\times\) 1, \\ 441 \(\times\) 32 \\ \end{tabular} & \(1\times 1\) & 1, 32 & 3969, 441 & 0.19–0.38 & Omnidirectional \\ \hline Motus [12] & \(3320\times 32\) & \(1\times 830\) & 4 & 1 & 0.5–1.5 & em32 Eigenmike \\ \hline Arri [20] & \(26560\times 1\) & \(1\times 5312\) & 1 & 5 & 0.25–1.5 & Omnidirectional \\ \hline BBC Maida Vale [13] & \(1586\times 32\) & \(2\times 1\) & 3–7 & 4–45 & 0.7–0.9 & em32 Eigenmike \\ \hline RSoANU & \
\begin{tabular}{c} 396 \(\times\) 4, \\ 396 \(\times\) 32 \\ \end{tabular} & \(1\times 2\) & 3 & 65–67 & 0.6–0.9 &
\begin{tabular}{c} B-format array, \\ em32 Eigenmike \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of publicly available RIR datasets. (#)RIRs indicate the number of RIRs times the number of channels. (#)Rooms indicate the number of rooms times the number of configurations. The last row corresponds to the introduced dataset. To the best of our knowledge, no existing datasets offer RIRs of a room recorded with both a higher-order spherical microphone array and a B-format array, especially across an extensive receiver grid. RSoANU dataset is particularly intended to facilitate the analysis of spatial soundfields and room acoustics with both higher-order and first-order ambisonics, taking into account the differences in spatial resolution, frequency response, directivity, and economic considerations of the two types of microphone arrays. Additionally, the receiver grid is designed to support the validation of RIR interpolation/extrapolation and soundfield translation methods for VR applications. Since the room environment and source-receiver locations are closely controlled during the measurement, direct comparisons between different acoustic settings can also be performed. This paper also presents an analysis of room acoustic parameters using the RSoANU dataset.