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An Attempt to Elicit Horizontal and Vertical Auditory Precedence Percepts without Pinnae Cues

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This investigation was a continuation of AES-143 paper #9832 and AES-145 paper #10066 where reliable auditory precedence in the elevated, ear-level, and lowered horizontal planes was examined. This experiment altered and eliminated the spectral influences that govern the detection of elevation and presented two different horizontal and vertical inter-channel time delays during a precedence-suppression task. A robust precedence effect was elicited via ear-level horizontal plane loudspeakers. In contrast, leading signal identification was minimal in the vertical condition and no systematic influence of the leading elevated and lowered median plane loudspeakers was witnessed suggesting that precedence was not active in the vertical condition. Observed influences that might have been generated by the lead-lag signal in the vertical plane was not consistent with any known precedence paradigms.

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