3D Meshgrid Impulse Response Dataset

This page provides an overview of the 3D meshgrid impulse response (IR) dataset. The dataset was measured in a room using a dense 3D spatial sampling grid. It is intended for use in room acoustics analysis, wavefield synthesis, and Physics-Informed Neural Networks (PINNs).

Data availability

The 3D meshgrid impulse response dataset is openly available on Zenodo:

https://doi.org/10.5281/zenodo.17051811

Measurement Animations

Animations showing impulse responses measured at four different speaker positions.

Animation 1 — Speaker position 1

Animation 2 — Speaker position 2

Animation 3 — Speaker position 3

Animation 4 — Speaker position 4

Speaker and Microphone Arrangement

The impulse responses were measured at a sampling frequency of 48 kHz on a three-dimensional grid with a spatial interval of 2 cm. The grid consists of 48 positions along the x-axis, 51 positions along the y-axis, and 26 positions along the z-axis, resulting in a set of IRs for each loudspeaker. After the measurements, reflections caused by the frames of the microphone array measurement system were suppressed, and the dataset was subsequently resampled at 16 kHz.

Room dimension : 8.4 × 6.14 × 2.66 m
Reverberation time : 0.65 s
Loudspeakers : Cambridge Audio MINX MIN12 (8 cm cubic)
Speaker positions : ([5.54, 4.64, 3.72, 3.42], 0.94, 1.42) m
Microphone array origin : (3.74, 2.94, 1.11) m
Grid interval : 0.02 m
Grid size : 48 × 51 × 26 = 63,648
Measured sampling frequency : 48,000 Hz
Excitation signal : 2-second up Time-Stretched Pulse (TSP)
Stored sampling frequency : 16,000 Hz
Stored impulse response length : 0.25 s (4,000 samples)

Fig. 1 — Speaker arrangement used in the measurements.

Fig. 2 — Microphone array used in the measurements.

HDF5 Dataset Structure

The dataset is stored in an .h5 file, created using MATLAB. The structure is as follows:

% RIR dataset
h5create(filename_out, '/rir', size(IR_flat), 'Datatype', 'single');
h5write(filename_out, '/rir', IR_flat);

h5create(filename_out, '/grid', size(grid_coords), 'Datatype', 'single');
h5write(filename_out, '/grid', grid_coords);

% Attributes
h5writeatt(filename_out, '/', 'fs', single(fs));
h5writeatt(filename_out, '/', 'c', single(c));

% Speaker / microphone / room metadata
h5writeatt(filename_out, '/', 'sp_pos', sp_pos);
h5writeatt(filename_out, '/', 'mic_array_pos', mic_arr_pos);
h5writeatt(filename_out, '/', 'room_size', room_size);
h5writeatt(filename_out, '/', 'grid_dimensions', grid_num);

Metadata Description

/rir : Impulse response data (time samples × flattened 3D grid )
/grid : Grid coordinates (x, y, z)
fs : Sampling frequency [Hz]
c : Speed of sound [m/s]
sp_pos : Speaker positions [m]
mic_array_pos : Microphone array positions [m]
room_size : Room dimensions [m]
grid_dimensions : Number of points along each axis

How to cite

Please cite as:
Yoichi Haneda, Yi Ren (2025). 3D meshgrid room impulse response dataset (part I) . Zenodo. https://doi.org/10.5281/zenodo.17051811

@dataset{haneda_meshgrid_ir_2025,
  author       = {Haneda, Yoichi, Ren, Yi},
  title        = {3D meshgrid room impulse response dataset (part I)},
  year         = {2025},
  publisher    = {Zenodo},
  doi          = {10.5281/zenodo.17051811},
  url          = {https://doi.org/10.5281/zenodo.17051811}
}

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