OperaRIR
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The <strong>OperaRIR</strong> dataset contains acoustical measurements conducted in the main auditorium of the Finnish National Opera and Ballet (FNOB), a modern-shaped horseshoe opera hall located in Helsinki, Finland. This type of hall contains multi-slopes and direction- and frequency-dependent decay characteristics. As such, this dataset is suitable for research in the field of directional and multi-slope decay analysis as well as 6DoF auralization. <strong>Dataset</strong> In this measurement campaign, 210 spatial room impulse responses (SRIR) were measured. More specifically, 97 individual seats on the parterre were measured sequentially using two different sound sources located on the stage for a total of 194 SRIRS. Four were selected as validation points among these measurement positions, and two extra measurement sets were performed using the same two sound sources, thus adding 16 SRIRs to the dataset. These validation points are intended for use in assessing the stability of the measurements and the background noise. The measurements were captured using a spherical microphone array (SMA), the Eigenmike (https://mhacoustics.com/), to obtain microphone signals that can be encoded as fourth-order ambisonic SRIRs. Two Genelec 8331A loudspeakers were used as sound sources and both were positioned at a depth of one meter, from the edge of the stage, on a 1.6m stand. The first source was located 5.53m from the lateral center, on the left side of the stage when looking from the parterre, and the second loudspeaker was situated in the center. Other than the loudspeakers, the stage was left empty, the curtain was fully raised, and no audience was present. For each measurement position, the microphone was aligned to face directly toward the sound source in the center of the stage (source 2) as a common reference point. The microphone signals are made available as measured, and the layout data file contains the rotation angles necessary to correctly align each measured position to a common plane, in the back of the stage. The files encoded in Ambisonics have been rotated to compensate for this initial alignment, and are all pointing towards the main stage. <br> The location of each microphone position was obtained using a top-view architectural plan of the hall (OperaRIR_measurement_layout.pdf). The coordinate system used here is in meters and the axis origin is located in the top left corner of the architectural plan, the two loudspeakers are positioned at y=0. As such, the coordinates of the first source are (7.30, 0.0), and the second source is located at (12.83, 0.0). <br> Each SRIR file is named according to the following convention :<br> <row number>_<seat number>_<source number>_<type>_<sample rate>.wav<br> <type> refers to either em32 microphone signals (mic), or Ambisonics format (hoa). For example Row4_Seat124_Source2_mic_48k The dataset contains: • An architectural overview of the hall and the measured seats (OperaRIR_measurement_layout.pdf)<br> • A file containing the XY coordinate of each measurement point and the rotation (OperaRIR_layout.mat)<br> • Measured SRIR from the control positions (OperaRIR_control_points_rir.zip)<br> • Measured DRIR from the em32 SMA as raw microphone signals (OperaRIR_em32_microphones_48k.zip)<br> • Measured SRIR rotated and encoded in 4th order Ambisonics (OperaRIR_hoa4_sn3d_48k.zip) For more information on the measurement procedure, please refer to the published article. <strong>Reference:</strong> B. Alary and A. Politis, "A Dataset for Location- and Direction-Dependent Reverberation Analysis," in Proc. 10th Convention of the European Acoustics Association, (Turin, Italy), Sep. 2023 Please use the above citation to refer to the dataset in a publication.
<strong>OperaRIR</strong> 数据集收录了芬兰国家歌剧与芭蕾剧院（Finnish National Opera and Ballet, FNOB）主礼堂的声学测量数据，该礼堂为坐落于芬兰赫尔辛基的现代马蹄形歌剧厅。此类厅堂具备多斜率、方向与频率相关的混响衰减特性，因此本数据集适用于方向及多斜率衰减分析、六自由度（6DoF）听觉仿真研究领域。 <strong>数据集</strong> 本次测量工作共采集210条空间房间冲激响应（spatial room impulse responses, SRIR）。具体而言，研究人员针对池座上的97个独立座位，使用舞台上的两套不同声源依次开展测量，累计得到194条SRIR。从中选取4个测点作为验证点；此外还使用相同的两台声源额外完成2组测量，新增16条SRIR，进一步扩充本数据集。上述验证点用于评估测量稳定性与背景噪声水平。 本次测量采用球形麦克风阵列（spherical microphone array, SMA）Eigenmike（https://mhacoustics.com/）进行信号采集，可将麦克风信号编码为四阶Ambisonics格式的空间房间冲激响应。实验使用两台Genelec 8331A有源扬声器作为声源，二者均安装于距舞台边缘1米、高度1.6米的支架上。第一台声源位于从池座视角观察的舞台左侧，距离舞台侧向中心5.53米；第二台声源位于舞台正中央。除扬声器外，舞台保持空旷，幕布完全升起，且无观众在场。 每个测点的麦克风均以朝向舞台中央的2号声源作为公共参考点完成对齐。原始采集的麦克风信号将以实测状态公开，布局数据文件包含将各测点对齐至舞台后方公共平面所需的旋转角度。Ambisonics格式文件已完成旋转校正，统一朝向主舞台。 各麦克风测点的位置信息取自该厅堂的顶视图建筑平面图（OperaRIR_measurement_layout.pdf）。本数据集采用米制坐标系，坐标原点位于建筑平面图的左上角，两台声源的y坐标均为0。据此，第一台声源的坐标为(7.30, 0.0)，第二台声源坐标为(12.83, 0.0)。 每条SRIR文件遵循如下命名规范：<行号>_<座位号>_<声源编号>_<类型>_<采样率>.wav。其中<类型>可代表em32麦克风原始信号（mic）或Ambisonics格式（hoa）。示例：Row4_Seat124_Source2_mic_48k。 本数据集包含以下内容： • 厅堂与实测座位的建筑总览文件（OperaRIR_measurement_layout.pdf） • 存储各测点XY坐标与旋转参数的布局文件（OperaRIR_layout.mat） • 对照测点的实测空间房间冲激响应压缩包（OperaRIR_control_points_rir.zip） • 以原始麦克风信号形式存储的em32 SMA实测定向房间冲激响应（directional room impulse responses, DRIR）压缩包（OperaRIR_em32_microphones_48k.zip） • 经旋转校正并编码为四阶Ambisonics格式的实测空间房间冲激响应压缩包（OperaRIR_hoa4_sn3d_48k.zip） 如需了解更多测量流程细节，请参阅已发表的学术论文。 <strong>参考文献：</strong>B. Alary与A. Politis，“面向位置与方向相关混响分析的数据集”，收录于第10届欧洲声学协会大会论文集（意大利都灵），2023年9月。请在学术发表中引用上述文献以标注本数据集。
