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Perceived Spatial Distribution and Width of Horizontal Ensemble of Independent Noise Signals as Function of Waveform and Sample Length

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This paper investigates the perceived sound distribution and the width of a horizontal loudspeaker ensemble as a function of signal length, as all speakers emit simultaneous, white Gaussian noise bursts. In Experiment 1, subjects indicated the perceived distribution of 10 frozen cases where signal length was 2.5 ms. In Experiment 2, two cases from the previous test were investigated with signal lengths of 5-640 ms. The results indicate that 1) ensembles consisting of different short noise bursts vary in perceived distribution between cases and 2) when the length of the signal is increased, the produced sound event is generally perceived more wide. In perceiving such cases, the hearing system possibly utilizes some temporal integration and/or adaptive processes.

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