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Spatial Impulse Response Measurement in an Urban Environment

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Acoustic impulse responses are used for multiple applications in sound design and auralisation. They are often recorded in real-world environments, and through the use of convolution can provide realistic reverberation effects. Analysis of impulse responses can provide insight into the acoustic behaviour of the recording location. Previous work on impulse response recording has focused on indoor environments. This work presents results of an acoustic survey conducted in a semi-enclosed outdoor courtyard. Impulse responses were measured using a B-format microphone to capture spatial information. Both a starter pistol and a loudspeaker reproducing swept-sine waves were used as the excitation source. The results are analysed regarding their spatial and reverberation characteristics. This work is part of a wider study investigating acoustic impulse responses from multiple outdoor locations, and aims to evaluate the performance of impulse response recording methods in an outdoor environment.

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