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Related Experiment Videos

Sentences for testing speech intelligibility in noise

B Hagerman

    Scandinavian Audiology
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Computer-edited Swedish sentences were used to test speech intelligibility in noise. Optimal performance was achieved at a specific speech level, indicating key factors for clear auditory communication.

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    Area of Science:

    • Audiology
    • Speech processing
    • Psychoacoustics

    Background:

    • Investigating speech intelligibility in noise is crucial for understanding auditory perception.
    • Computer-generated noise and modified speech materials offer controlled experimental conditions.

    Purpose of the Study:

    • To evaluate the intelligibility of computer-edited Swedish sentences in synthesized noise.
    • To determine the impact of speech level on intelligibility at a constant signal-to-noise ratio (S/N).

    Main Methods:

    • Synthesized noise with identical speech spectrum and amplitude modulation was created.
    • Monaural testing was conducted on 20 normal-hearing subjects.
    • Repeated threshold measurements and intelligibility curve fitting were performed.

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    Main Results:

    • A standard deviation of 0.44 dB was observed in repeated threshold measurements.
    • Intelligibility curves showed maximum steepnesses of 25%/dB (in noise) and 10%/dB (without noise).
    • Peak performance occurred at a speech level of 53 dB for a constant S/N.

    Conclusions:

    • Computer-generated speech and noise materials can be reliably used for intelligibility studies.
    • Speech level significantly impacts intelligibility, with an optimal level identified.
    • Learning effects were minimal and primarily attributed to factors other than word memorization.