I did a follow-up to the 1993 paper that Brian mentions and in that follow-up I used the gated stimulus paradigm. I further chose stimulus alternatives that had been confused in the initial identification study. After presenting the pair of sounds that had been confused, the subjects then heard one of the sounds with duration increased in 50 ms increments. Very little of the sound was needed to make the choice between which of the pair was being heard.
The paper was presented at ICAD 94, and I can scan it and send it to anyone who would want it.
The results are very task specific--the listeners could quickly adopt a strategy to focus on an initial acoustic difference between the pair and once they heard this cue, make their judgement.
However, Guillaume et al (ICAD 2004, available at http://icad.org/websiteV2.0/Conferences/ICAD2004/posters/guillaume_etal.pdf) also using a gated paradigm found that very little of the sound is needed.
From: Sylvain Cl=E9ment [mailto:sylvain.clement@xxxxxxxxxxxxxx] Sent: Thursday, September 13, 2007 06:49 AM To: AUDITORY@xxxxxxxxxxxxxxx Subject: How much is needed for sound identification ?
Dear List members,
We are currently running several experiments on environmental sounds identification vs image identification.
The literature in hearing seems to be quite poor whereas a lot of work have been done in the visual domain.
Does anybody have know studies that tried to measure how long of a sound=
>is needed to get the identification of the sound ("it's a bird") or get =
>it's super-ordonate category ("it's an animal") ?
>Thanks in advance for any references.
>Neuropsychology & Auditory Cognition Team
>-- >Sylvain CLEMENT (MCF)
>JE Neuropsychologie et Cognition Auditive (JE 2497)
>UFR de Psychologie
>BP 60149, Universite Ch. de Gaulle Lille 3
>Domaine universitaire "Pont de Bois"
>59 653 Villeneuve d'ascq Cedex
>tel : (03 20 41) 64 42
----=_vm_0011_W8530210911_5801_1189686045 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
<html><br> Ballas (1993) measured identification of environmental sounds that were t= runcated to 700 ms. He found they were quite well identified, but h= e did not measure the time course - rather he measured reaction time, whi= ch varied quite a bit.<br><br><font size=3D"-1"><font size=3D"3"><b>Balla= s</b>, J. A. "Common Factors in the Identification of an Assortment of <b=
>Brief</b> Everyday <b>Sounds</b>." <b>J</b>. Exp. Psych.: Hum. Percep. =
& Perf. 19 (1993): 250--26<br></font><br></font>In my environmental s= tudies I have tried to edit sounds so that they were the briefest possibl= e duration and still easily identifiable in pilot studies. I found = quite a range of times needed - some complex events, like a bowling ball = rolling down a lane, or a tree falling, have quite extended times courses= (> 3 s) needed to provide all the information necessary.<br><br>There= was a study involving time course of identification of environmental sce= nes that was presented at a conference. I am away from the office u= ntil next week, but I can provide the link then.<br><br>Brian Gygi<br><br=
-- James A. Ballas, Ph.D.
Naval Research Laboratory Code 5585 Washington, DC 20375-5337 tel: 202-404-7988 cell: 571-245-3019 fax: 202-767-1122 SIPR: ballas@xxxxxxxxxxxxxxxxxxxx
Description: S/MIME Cryptographic Signature