Change search
ReferencesLink to record
Permanent link

Direct link
Human echolocation: Pitch versus loudness information
KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH. KTH, School of Computer Science and Communication (CSC), Centres, Centre for Speech Technology, CTT.
2011 (English)In: Perception, ISSN 0301-0066, E-ISSN 1468-4233, Vol. 40, no 7, 840-852 p.Article in journal (Refereed) Published
Abstract [en]

Blind persons emit sounds to detect objects by echolocation. Both perceived pitch and perceived loudness of the emitted sound change as they fuse with the reflections from nearby objects: Blind persons generally are better than sighted at echolocation, but it is unclear whether this superiority is related to detection of pitch, loudness, or both. We measured the ability of twelve blind and twenty-five sighted listeners to determine which of two sounds, 500 ms noise bursts, that had been recorded in the presence of a reflecting object in a room with reflecting walls using an artificial head. The sound pairs were original recordings differing in both pitch and loudness, or manipulated recordings with either the pitch or the loudness information removed. Observers responded using a 2AFC method with verbal feedback. For both blind and sighted listeners the performance declined more with the pitch information removed than with the loudness information removed. In addition, the blind performed clearly better than the sighted as long as the pitch information was present, but not when it was removed. Taken together, these results show that the ability to detect pitch is a main factor underlying high performance in human echolocation.

Place, publisher, year, edition, pages
2011. Vol. 40, no 7, 840-852 p.
National Category
Applied Psychology
URN: urn:nbn:se:kth:diva-51446DOI: 10.1068/p6898ISI: 000296601200007ScopusID: 2-s2.0-80053065117OAI: diva2:464295
QC 20111213Available from: 2011-12-13 Created: 2011-12-12 Last updated: 2011-12-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Schenkman, Bo N.
By organisation
Speech, Music and Hearing, TMHCentre for Speech Technology, CTT
In the same journal
Applied Psychology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 37 hits
ReferencesLink to record
Permanent link

Direct link