Abstract
To measure impulse responses in rooms and free fields is a daily Job for acousticians but mainly this is done in unoccupied cases. Results for the occupied case are derived by use of simulation software or by estimations based on experience. Using a newly developed multithread algorithm speech, music or any other signals from a microphone input and from a mixing console can be utilized to obtain impulse response data for further evaluation. In a soccer stadium in presence of more than 50.000 visitors the measurements have been done even as a function of the degree of occupancy. The method will be explained in detail and the needed conditions are described. All factors of influence are discussed to obtain results to derive impulses responses and to calculate the STI values in post processing.
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