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Human echolocation using click trains and continuous noise

Schenkman, Bo N. ; Nilsson, Mats E. and Grbic, Nedelko LU (2011) 27th Annual Meeting of the International Society for Psychophysics 27. p.13-18
Abstract
Blind people may detect objects from the information in reflected sounds, echolocation. Detection as a function of the number of clicks compared to a continuous noise was tested by presenting clicks of 5 ms with rates from 1 to 64 clicks during a 500 ms period and a 500-ms continuous white noise. The sounds were recorded in an ordinary room through an artificial binaural head. The reflecting object was an aluminum disk, diameter 0.5 m, at distances of 1 and 1.5 m. These sounds were later presented to 3 blind and 16 sighted participants in a laboratory using a 2AFC methodology. The task was to detect which of the two sounds that contained a reflecting object. Feedback was provided. The blind participants had a higher detection than the... (More)
Blind people may detect objects from the information in reflected sounds, echolocation. Detection as a function of the number of clicks compared to a continuous noise was tested by presenting clicks of 5 ms with rates from 1 to 64 clicks during a 500 ms period and a 500-ms continuous white noise. The sounds were recorded in an ordinary room through an artificial binaural head. The reflecting object was an aluminum disk, diameter 0.5 m, at distances of 1 and 1.5 m. These sounds were later presented to 3 blind and 16 sighted participants in a laboratory using a 2AFC methodology. The task was to detect which of the two sounds that contained a reflecting object. Feedback was provided. The blind participants had a higher detection than the sighted, but there were also differences among the blind. These results are put in relation to physical features such as the autocorrelation function and spectral variations. (Less)
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author
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publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of the 27th Annual Meeting of the International Society for Psychophysics
volume
27
pages
6 pages
conference name
27th Annual Meeting of the International Society for Psychophysics
conference location
Herzliya, Israel
conference dates
2011-10-24 - 2011-10-27
language
Swedish
LU publication?
no
id
9ab4b141-66d5-438c-8d93-917297871c6d
alternative location
http://www.ispsychophysics.org/fd/index.php/proceedings/article/view/382/374
date added to LUP
2016-06-23 17:02:10
date last changed
2021-03-22 16:29:56
@inproceedings{9ab4b141-66d5-438c-8d93-917297871c6d,
  abstract     = {{Blind people may detect objects from the information in reflected sounds, echolocation. Detection as a function of the number of clicks compared to a continuous noise was tested by presenting clicks of 5 ms with rates from 1 to 64 clicks during a 500 ms period and a 500-ms continuous white noise. The sounds were recorded in an ordinary room through an artificial binaural head. The reflecting object was an aluminum disk, diameter 0.5 m, at distances of 1 and 1.5 m. These sounds were later presented to 3 blind and 16 sighted participants in a laboratory using a 2AFC methodology. The task was to detect which of the two sounds that contained a reflecting object. Feedback was provided. The blind participants had a higher detection than the sighted, but there were also differences among the blind. These results are put in relation to physical features such as the autocorrelation function and spectral variations.}},
  author       = {{Schenkman, Bo N. and Nilsson, Mats E. and Grbic, Nedelko}},
  booktitle    = {{Proceedings of the 27th Annual Meeting of the International Society for Psychophysics}},
  language     = {{swe}},
  pages        = {{13--18}},
  title        = {{Human echolocation using click trains and continuous noise}},
  url          = {{http://www.ispsychophysics.org/fd/index.php/proceedings/article/view/382/374}},
  volume       = {{27}},
  year         = {{2011}},
}