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Masking-level differences for repeated filtered transients.

W A Yost, D Dolan

    The Journal of the Acoustical Society of America
    |June 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

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    Masking-level differences (MLDs) for low-pass pulses were consistently large (11-14 dB). High-pass pulses required at least 12 repetitions to achieve smaller MLDs (2-4 dB), suggesting limitations in high-frequency auditory processing.

    Area of Science:

    • Auditory Neuroscience
    • Psychoacoustics
    • Signal Processing

    Background:

    • Masking-level differences (MLDs) are crucial for understanding binaural hearing.
    • Transient signals and their repetition characteristics influence auditory perception.
    • Binaural configurations (NoSo, NoSpi, NoSd) probe interaural time and intensity differences.

    Purpose of the Study:

    • To investigate how the number of repetitions and repetition rate of transient signals affect MLDs.
    • To compare MLDs for high-pass and low-pass filtered signals across different binaural configurations.
    • To explore the processing capabilities of high-frequency binaural channels for low-frequency temporal envelopes.

    Main Methods:

    • Obtained MLDs for repeated high-pass (2000 Hz) and low-pass (2000 Hz) 100-microsecond pulses.

    Related Experiment Videos

  • Varied the number of transient repetitions and repetition rate.
  • Utilized NoSo, NoSpi, and NoSd binaural configurations, including interaural delays for NoSd.

    • Main Results:

    • Consistent MLDs of 11-14 dB for low-pass transients, irrespective of repetition parameters or binaural configuration.
    • MLDs of 2-4 dB for high-pass transients were observed only when transients were repeated 12 or more times.
    • High-pass MLDs were independent of repetition rate and binaural configuration.

    Conclusions:

    • High-frequency binaural channels can process noisy low-frequency temporal envelopes, but with reduced efficacy compared to low-frequency processing.
    • The number of repetitions is a critical factor for high-frequency binaural processing of transient signals.
    • Binaural processing of high-frequency spectral information is more robust than processing of low-frequency temporal envelopes in noise.