Frontal space yields better auditory motion discrimination than lateral space

Evidence

For any trial the starting point, motion direction, velocity (53–2400°/s), duration (30–225 ms) and angular range (12–72°) of the noise sweeps were randomized. Each test stimulus had a motion direction being opposite to that of the reference stimuli. Stimuli were presented in the frontal or the lateral auditory space. … The angular extent of the motion had a large effect on the owl’s discrimination sensitivity allowing a better discrimination for a larger angular range of the motion. In contrast, stimulus velocity or stimulus duration had a smaller, although significant effect. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3178 (#exemplifies, via linked claim)

Categorization

• XREF: connects to: Lateral sounds drive spatial perception more than frontal or rear sounds; Angular range dominates hearing-driven motion detection over speed and duration.; Angular range, not velocity, dominates barn owl auditory motion discrimination sensitivity — Dijk, Pim van, Physiology, Psychoacoustics and…, 3178 (+1 more)

Related

• Motion direction perception requires a much larger angular sweep than static localization (similarity 0.89)
• Inhibition and adaptation, not velocity matching, drive motion direction selectivity (similarity 0.89)
• Angular range dominates hearing-driven motion detection over speed and duration. (similarity 0.89)
• Angular range, not velocity, dominates barn owl auditory motion discrimination sensitivity (similarity 0.86)
• Owls detect direction changes more readily in frontal than lateral space. (similarity 0.85)
• Overlapping bilateral neural representation and confined receptive fields make frontal audio localization most accurate (similarity 0.85)
• Barn owls can be trained to report acoustic motion direction changes (similarity 0.85)
• Auditory motion direction detection requires much larger angular sweeps than static sound localization does. (similarity 0.85)
• Motion perception improves with larger sweep angles more than with faster sweeps (similarity 0.84)
• Barn owls distinguish sound motion only across spans far exceeding their static localization acuity (similarity 0.83)
• Barn owls do not decode sound motion by comparing start and end points (similarity 0.82)
• Auditory motion perception is not computed from endpoint comparisons (similarity 0.81)
• The barn owl brain over-represents frontal space with overlapping maps and sharper neural fields. (similarity 0.80)
• Stimulus velocity badly predicts owl motion discrimination because duration and range co-determine it (similarity 0.80)
• Lateral sounds drive spatial perception more than frontal or rear sounds (similarity 0.79)

Broader Connections

• Angular range, not velocity, dominates barn owl auditory motion discrimination sensitivity #exemplifies (0.95) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3178
• Angular range dominates hearing-driven motion detection over speed and duration. #expands (0.85)