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Vertical Localization and Image Size Effects in Loudspeaker Reproduction

The apparent elevation and size of auditory images from hidden loudspeakers is examined in two experiments. In the first, band-limited and broadband noise stimuli were presented from loudspeakers in a vertical array. Low frequency stimuli were heard as lower in space than equivalent high frequency stimuli. Low frequency and loud stimuli were judged larger than high frequency and quiet stimuli. The second experiment tested whether the localization difference between low and high frequency components was maintained when presented simultaneously - subjects adjusted the height of a woofer and tweeter, so that both seemed to come from a specified height. In all conditions, the woofer was positioned above the tweeter, suggesting that the effect can be maintained for simultaneous stimuli.

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