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Related Experiment Videos

Combining energetic and informational masking for speech identification.

Gerald Kidd1, Christine R Mason, Frederick J Gallun

  • 1Department of Speech, Language and Hearing Sciences and Hearing Research Center, Sargent College, Boston University, 635 Commonwealth Avenue, Boston, Massachusetts 02215, USA. gkidd@bu.edu

The Journal of the Acoustical Society of America
|September 15, 2005
PubMed
Summary

Speech masker sounds cause more masking than noise, indicating informational masking. Adding contralateral noise significantly improves speech identification by aiding sound segregation.

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Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Speech processing

Background:

  • Understanding speech in noisy environments is crucial.
  • Informational masking, distinct from energetic masking, poses a significant challenge.
  • The role of binaural cues in segregating competing sounds requires further investigation.

Purpose of the Study:

  • To investigate the combined effects of energetic and informational maskers on speech identification.
  • To explore the impact of masker characteristics (speech vs. noise) on masking release.
  • To examine the influence of contralateral noise on auditory scene analysis and speech perception.

Main Methods:

  • Speech targets and maskers were filtered into 15 narrow frequency bands.
  • Combinations of speech and noise maskers were presented.

Related Experiment Videos

  • Masking release was measured under different masker overlap and ear presentation conditions.

    • Main Results:

    • Speech maskers produced greater masking than spectrally matched noise maskers, consistent with informational masking.
    • Adding non-overlapping noise to a speech masker reduced masking.
    • Presenting noise to the contralateral ear yielded a greater release from masking than ipsilateral noise.

    Conclusions:

    • Informational masking plays a key role in speech identification difficulties.
    • Contralateral noise can enhance speech perception by facilitating auditory segregation.
    • Binaural differences, even small ones, can significantly improve the perceptual separation of sounds.