Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Full Access Temporal integration in sound localization via head rotation

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Temporal integration in sound localization via head rotation

  • HTML
  • PDF
Add to Favorites
You must be logged in to use this functionality

image of Seeing and Perceiving
For more content, see Multisensory Research and Spatial Vision.

Information about a sound source’s location in the front/back dimension is present in the relation between head rotation and the resulting changes in interaural time- or level-difference cues. The use of such dynamic cues for localization requires the auditory system to have access to an accurate representation of the orientation and motion of the head in space. We measured, in active and passive rotation conditions, and as a function of head-rotation angle and velocity, normally hearing human listeners’ ability to localize front and rear sources of a low-frequency (0.5–1 kHz) noise band that was not accurately localizable in the absence of head motion. Targets were presented while the head was in motion at velocities of 50–400°/s (active neck rotation) or 25–100°/s (whole-body passive rotation), and were gated on and off as the head passed through a variable-width spatial window. Accuracy increased as window width was increased, which provided access to larger interaural cue changes, but decreased as head-turn velocity increased, which reduced the duration of the stimuli. For both active and passive rotation, these effects were almost exactly reciprocal, such that performance was related primarily to the duration of the stimulus, with ∼100 ms duration required for 75% correct front/back discrimination regardless of the cue-change magnitude or mode of rotation. The efficacy of the dynamic auditory cues in the passive rotation condition suggests that vestibular input is sufficient to inform the auditory system about head motion.

Affiliations: 1: 1National Centre for Audiology & School of Communication Sciences and Disorders, Western University, CA; 2: 2Health and Rehabilitation Sciences Graduate Program, Western University, CA

Information about a sound source’s location in the front/back dimension is present in the relation between head rotation and the resulting changes in interaural time- or level-difference cues. The use of such dynamic cues for localization requires the auditory system to have access to an accurate representation of the orientation and motion of the head in space. We measured, in active and passive rotation conditions, and as a function of head-rotation angle and velocity, normally hearing human listeners’ ability to localize front and rear sources of a low-frequency (0.5–1 kHz) noise band that was not accurately localizable in the absence of head motion. Targets were presented while the head was in motion at velocities of 50–400°/s (active neck rotation) or 25–100°/s (whole-body passive rotation), and were gated on and off as the head passed through a variable-width spatial window. Accuracy increased as window width was increased, which provided access to larger interaural cue changes, but decreased as head-turn velocity increased, which reduced the duration of the stimuli. For both active and passive rotation, these effects were almost exactly reciprocal, such that performance was related primarily to the duration of the stimulus, with ∼100 ms duration required for 75% correct front/back discrimination regardless of the cue-change magnitude or mode of rotation. The efficacy of the dynamic auditory cues in the passive rotation condition suggests that vestibular input is sufficient to inform the auditory system about head motion.

Loading

Full text loading...

/deliver/18784763/25/0/18784763_025_00_S197_text.html;jsessionid=QKAhlRXx0rdllhasFbey_r1i.x-brill-live-03?itemId=/content/journals/10.1163/187847612x648396&mimeType=html&fmt=ahah
/content/journals/10.1163/187847612x648396
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/187847612x648396
Loading
Loading

Article metrics loading...

/content/journals/10.1163/187847612x648396
2012-01-01
2016-12-11

Sign-in

Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation