microphone array; direction of arrival; room impulse response; acoustics; audio
This dataset consists of room impulse responses from a waste container recorded at different fill levels. The data were captured (Mic.: MAX4466) with a length of 4096 samples at a sampling rate of 10 kHz. A sine sweep was utilized between 2048 and 3072 samples. Spectral subtraction preprocessing was applied to enhance the data clarity, utilizing a 1024-sample segment recorded prior to the sine sweep. The calculated RIR begins at sample 3072. Folder names within the dataset correspond to the fill levels of the waste container.
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The data set contains 152 measurements of room impulse responses for direction of arrival estimation, using a compact three-channel microphone array. Sources are placed at 10-degree intervals from -90 to 90 degrees in the azimuth plane at range 150 cm. There are also 5 off-grid measurement positions and 6 off-range positions - at ranges 1 m, 2 m, 2.5 m and 3 m. The measurements are performed in a furnished classroom, which is approximately rectangular and of dimensions 9 x 6 x 3 m. The reverberation time is 0.4 s.
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