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Human echolocation using click trains and continuous noise
Ansvarig organisation
2011 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
Herzliya, Israel: International Society for Psychophysics , 2011.
Identifikatorer
URN: urn:nbn:se:bth-7348Lokalt ID: oai:bth.se:forskinfoB3BEB6C90DF3D139C125797B0042A262OAI: oai:DiVA.org:bth-7348DiVA, id: diva2:834955
Konferens
Annual Meeting of the International Society for Psychophysics
Tillgänglig från: 2012-09-18 Skapad: 2012-01-04 Senast uppdaterad: 2015-06-30Bibliografiskt granskad

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