Re: Auditory Spatial Stream Segregation

["Dennis P. Phillips" <Dennis.Phillips@xxxxxx>]

Title: Re: Auditory Spatial Stream Segregation

Hello Imran:

You might like to check out Susan Boehnke's work:

Boehnke, S.E. and Phillips, D.P.  (2005) The relation between auditory temporal interval processing and sequential stream segregation examined with stimulus laterality differences.  Perception & Psychophysics, 67: 1088-1101.

It may not speak directly to musical issues, but she does a nice job of addressing cues in spatial stream segregation.  I hope that this helps.  Kind wishes,

Dennis PP

---------------------------------------------------------
Dennis P. Phillips, Ph.D.
Professor, Department of Psychology
Professor, Department of Surgery

Mail & courier address:
Department of Psychology
Dalhousie University
1355 Oxford Street

Halifax, NS, Canada  B3H 4J1

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> Dear All,
>  
>            
> I was looking for a task to assess spatial auditory stream
> segregation  (sequential stream segregation based on localization
> and/or lateralization cues) in literature and found an experiment done
> by Judd T.(1979):(Spatial stream segregation in The Journal of
> the Acoustical Society of America 1979;65(S1):S122 - S122).
> According to him when the tones of a slow (e.g., 1 tone/s) tone
> sequence alternate between widely placed speakers, observers report
> hearing a single melody which moves back and forth between the
> speakers like a pingpong game. When the same sequence is presented
> more rapidly (e.g., 8 tones/s), observers report hearing two
> independent melodies or streams, one from each speaker (Spatial Stream
> Segregation). The other studies that I found to study spatial stream
> segregation were those which used presentation of multitalker babble
> or other noise through two or three loudspeakers in free field and
> then present a target speech stimulus (word/sentence) through any one
> speaker the position of which can or cannot be known by the listener,
> the task of the listener is to identify the target correctly in
> presence of the spatial noise. I tried simulating the experiment by
> Judd using slow and fast alternating tones between two widely placed
> speakers, although I could hear the galloping like/ping pong like
> rhythm for the slow tone presentation but then could not actually get
> the split stream percept (I am comparing these percepts to the typical
> sequential stream segregated percepts based on fundamental frequency
> or other strong spectral or temporal cues, especially the
> primitive stream segregation percepts as demostrated by Bregman and
> colleagues)  in the faster tone presentations. I could not
> get access to the entire study or article as it was just the online
> abstract which was available. I was wondering  if this task
> is really efficient to assess spatial auditory stream segregation.
> Moreover I also wanted any suggestions regarding any difference in
> efficacy of assessment of stream segregation if the target positions
> for presentations of target speech stimuli are same or different on
> each presentation, and if the target position is either
> known/predictable or unpredictable by the listener. Also in this task
> will roving the noise/babble across different speakers (eg. speakers
> 3,4,5 for the first trial and speaker 6, 7, 8 for the next trial) will
> give any addtional information regarding auditory stream segregation ?
> I would also request everyone to share if any other tasks that would
> be more efficient or appropriate to assess the spatial stream
> segregation ability.
>  
> Best Regards,
> Imran Dhamani
> PhD. Student (Audiology).
>  
> $$$$$ monty@@@@
>

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