The influence of vision on the absolute identification of sound-source position

Shelton, Brian R.; Searle, C. L.

doi:10.3758/bf03198830

Cited by 95 publications

(65 citation statements)

References 23 publications

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“…In both cases, the brain resolves a discrepancy in spatial information provided by the auditory and visual systems by altering sound localization to match visual localization (Shelton and Searle, 1980;Warren et al, 1982). Also, in both cases there is a limit to the angular discrepancy that can be overcome: ap- proximately 20" for prism rearing in barn owls, and approximately 30" for visual capture in humans (Jackson, 1953;Thurlow and Rosenthal, 1976).…”

Section: Discussionmentioning

confidence: 99%

Vision calibrates sound localization in developing barn owls

Knudsen

1989

J. Neurosci.

136

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This study demonstrates that continuous exposure of baby barn owls to a displaced visual field causes a shift in sound localization in the direction of the visual displacement. This implies an innate dominance of vision over audition in the development and maintenance of sound localization. Twelve owls were raised from the first day of eye opening wearing binocular prisms that displaced the visual field to the right by 11 degrees, 23 degrees, or 34 degrees. The prisms were worn for periods of up to 7 months. Consistent with previous results (Knudsen and Knudsen, 1989a), owls reared with displacing prisms did not adjust head orientation to visual stimuli. While wearing prisms, owls consistently oriented the head to the right of visual targets, and, as soon as the prisms were removed, they oriented the head directly at visual targets, as do normal owls. In contrast, prism-reared owls did change head orientation to sound sources even though auditory cues were not altered significantly. Birds reared wearing 11 degrees or 23 degrees prisms oriented the head to the right of acoustic targets by an amount approximately equal to the optical displacement induced by the prisms. Birds raised wearing 34 degrees prisms adjusted sound localization by only about 50% of the optical displacement. Thus, visually guided adjustment of sound localization appears to be limited to about 20 degrees in azimuth. The data indicate that when confronted with consistently discordant localization information from the auditory and visual systems, developing owls use vision to calibrate associations of auditory localization cues with locations in space in an attempt to bring into alignment the perceived locations of auditory and visual stimuli emanating from a common source. Vision exerts this instructive influence on sound localization whether or not visual information is accurate.

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Section: Discussionmentioning

confidence: 99%

Vision calibrates sound localization in developing barn owls

Knudsen

1989

J. Neurosci.

136

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“…A crossmodal spatial interaction of visual and acoustic stimuli could have occurred, resulting in a visual bias of sound localization (see, e.g., Lewald et al, 2001;Lewald & Guski, 2003;Shelton & Searle, 1980;Warren, 1970). Moreover, the visual stimulus could have cued the spatial position where the acoustic target would have been located at the moment of tactile stimulation.…”

Section: Discussionmentioning

confidence: 99%

“…An increase in the luminance of the visual reference indicated the point in time when the target position had to be judged. Thus, it is possible that auditory-visual crossmodal interactions, in particular a visual bias of the sound localization (the so-called ventriloquism effect), were superimposed over potential genuine auditory effects (see, e.g., Lewald, Ehrenstein, & Guski, 2001;Lewald & Guski, 2003;Shelton & Searle, 1980;Warren, 1970). Another critical factor in Mateeff and Hohnsbein's study is the potential influence of different perceptual latencies of the auditory event (the moving acoustic target) and the visual event (the increase in luminance of the visual reference).…”

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confidence: 99%

Localization of moving sound

Getzmann

Lewald

2007

Perception & Psychophysics

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“…Accordingly, sound localization in the MP is best for sources in the front and worst for sources that are above ear level or in the rear (e.g., Noble & Gates, 1985;Shelton & Searle, 1980; for a review, see Wightman & Kistler, 1993).…”

Section: Notesmentioning

confidence: 99%

The influence of the acoustic context on vertical sound localization in the median plane

Getzmann

2003

Perception & Psychophysics

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The influence of background sounds (frames) on verticallocalization of single sound sources (targets) was examined in four experiments. Loudspeakers (five targets and four frames) were positioned in the median plane, ranging from 130º to 230º above and below the subject's ear level.The subjects determined the vertical position of the targets by either verbal judgments or manual pointing. Frame and target sounds were presented concurrently or successively with a 1-sec interval; both consisted of (1) 300-Hz square waves, (2) noise, or (3) targets of noise and frames of 300-Hz square waves. Particularly in the second condition, the subjects consistently shifted the apparent target positions away from the frame locations. This contrast effect persisted even 1 sec after the offset of the frames. No effect was found with different waveforms for the frame and the target. Results are related to recent findings indicating a similar effect in the azimuthal dimension. Possibly the effect is based on a mechanism in which the auditory system adapts to recently heard sound source positions.

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The influence of vision on the absolute identification of sound-source position

Cited by 95 publications

References 23 publications

Vision calibrates sound localization in developing barn owls

Vision calibrates sound localization in developing barn owls

Localization of moving sound

The influence of the acoustic context on vertical sound localization in the median plane

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