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Growth function for human response to large-amplitude impulse noise

P D Schomer

    The Journal of the Acoustical Society of America
    |December 1, 1978
    PubMed
    Summary

    The U.S. EPA

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    Area of Science:

    • Acoustics
    • Environmental Science
    • Human Response to Noise

    Background:

    • The U.S. Environmental Protection Agency (EPA) proposed using C-weighted day/night level for assessing impulse noise, including sonic booms and blast noise.
    • A key question involves the growth function for human annoyance to impulse noise, with previous studies showing a 6-7 dB increase for doubling annoyance.
    • This contrasts with common noise sources, which show a 10 dB increase for a doubling of annoyance.

    Purpose of the Study:

    • To reanalyze existing data on human response to impulse noise using C-weighting.
    • To determine the growth function for human annoyance to large-amplitude impulse noise.
    • To compare the growth function of impulse noise with that of common noise sources.

    Main Methods:

    • Reanalysis of data from Kryter and Young on human response to impulse noise.
    • Application of C-weighting to the analyzed data.
    • Inclusion of only large-amplitude impulse noise data in the reanalysis.

    Main Results:

    • The reanalysis revealed a growth function of approximately 10 dB for a doubling of annoyance for impulse noise.
    • This finding aligns with the growth function observed for common noise sources (e.g., A-weighted noise from planes and vehicles).
    • The study demonstrates that C-weighted impulse noise exhibits a similar annoyance growth rate to common A-weighted noise.

    Conclusions:

    • The findings support the use of C-weighted day/night level for assessing impulse noises like sonic booms and blast noise.
    • The equal growth function strengthens the EPA's proposed assessment method for large-amplitude impulse noise.
    • This research provides a clearer understanding of human annoyance response to impulse noise, aiding environmental noise policy.

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