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Related Experiment Videos

Auditory backward recognition masking with well-practiced listeners.

H J Kallman1, S C Brown

  • 1Psychology Department, State University of New York, Albany 12222.

The Journal of Auditory Research
|October 1, 1986
PubMed
Summary
This summary is machine-generated.

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Auditory backward recognition masking (ABRM) shows that tone maskers significantly impair pitch discrimination more than white noise maskers. This effect persists even with experienced listeners, demonstrating interference with preperceptual auditory memory.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Cognitive psychology

Background:

  • Auditory backward recognition masking (ABRM) is a phenomenon where a backward masker interferes with the perception of a preceding auditory stimulus.
  • Previous research often utilized naive listeners to demonstrate ABRM, raising questions about its robustness with experienced participants.

Purpose of the Study:

  • To investigate the effectiveness of auditory backward recognition masking (ABRM) in experienced listeners performing a pitch discrimination task.
  • To compare the disruptive effects of tonal versus noise maskers on auditory memory.
  • To examine the influence of inter-stimulus interval (ISI) on ABRM.

Main Methods:

  • Five experienced adult listeners performed a pitch discrimination task (identifying 'higher' or 'lower' pitch).

Related Experiment Videos

  • A 20-ms test tone was presented, followed by a 100-ms masker (800 Hz tone or white noise) after a variable silent interval (20-250 ms).
  • Stimulus intensity was maintained at approximately 77 dbA.

    • Main Results:

    • All participants exhibited significant ABRM when the backward masker was a pure tone, reducing performance to near chance levels.
    • Masking effects were substantially reduced when the backward masker was white noise.
    • The disruptive effect of the tone masker persisted until the inter-stimulus interval exceeded 80 ms for most participants, and up to 250 ms for some.

    Conclusions:

    • Auditory backward recognition masking (ABRM) can be effectively demonstrated in experienced listeners.
    • Tonal maskers cause greater interference than noise maskers, suggesting that the overlap in stimulus properties is crucial for ABRM.
    • The findings support the theory that backward masking interferes with auditory information held in a multichannel preperceptual store.