Tham khảo tài liệu 'advances in sound localization part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Spatial Audio Applied to Research with the Blind 227 interesting result was found by Ohuchi et al. 2006 in testing angular and distance localization for azimuthally located sources with and without head movement. Overall blind subjects outperformed sighted control for all positions. For distance estimations in addition to being more accurate errors by blind subjects tended to be overestimations while sighted control subject errors were underestimations in accordance with numerous other studies. These studies indicate that one must take a second look at many of the accepted conclusions of auditory perception especially spatial auditory perception when considering the blind who do not necessarily have the same error typologies due to different learning sensory conditions. A number of studies such as Weeks et al. 2000 have focused on neural plasticity or changes in brain functioning evaluated for auditory tasks between blind and sighted subjects. Results by both Elbert et al. 2002 and Poirier et al. 2006 have shown increased activity in typically visual areas of the brain for blind subjects. While localization spectral analysis and other basic tasks are of significant importance in understanding basic auditory perception and differences that may exist in performance ability between sighted and blind individuals these performance differences are inherently limited by the capacity of the auditory system. Rather it is in the exploitation of this acoustic and auditory information requiring higher level cognitive processing where blind individuals are able to excel relative to the sighted population. Navigational tasks are one instance where this seems to be clear. Strelow Brabyn 1982 performed an experiment where subjects were to walk a constant distance from a simple straight barrier being a wall or series of poles at 2 m intervals diameter 15 cm or 5 cm without any physical contact to the barrier. Footfall noise and finger snaps were the only information. With 8 blind .
