Development of computer program ENMASK for prediction of residual environmental masking-noise spectra, from any three independent environmental parameters

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Residual environmental sound can mask intrusive4 (unwanted) sound. It is a factor that can affect noise impacts and must be considered both in noise-impact studies and in noise-mitigation designs. Models for quantitative prediction of sensation level (audibility) and psychological effects of intrusive noise require an input with 1/3 octave-band spectral resolution of environmental masking noise. However, the majority of published residual environmental masking-noise data are given with either octave-band frequency resolution or only single A-weighted decibel values. A model has been developed that enables estimation of 1/3 octave-band residual environmental masking-noise spectra and relates certain environmental parameters to A-weighted sound ... continued below

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15 p.

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Chang, Y.-S.; Liebich, R. E. & Chun, K. C. March 31, 2000.

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  • Argonne National Laboratory
    Publisher Info: Argonne National Laboratory, Argonne, IL (United States)
    Place of Publication: Argonne, Illinois

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Description

Residual environmental sound can mask intrusive4 (unwanted) sound. It is a factor that can affect noise impacts and must be considered both in noise-impact studies and in noise-mitigation designs. Models for quantitative prediction of sensation level (audibility) and psychological effects of intrusive noise require an input with 1/3 octave-band spectral resolution of environmental masking noise. However, the majority of published residual environmental masking-noise data are given with either octave-band frequency resolution or only single A-weighted decibel values. A model has been developed that enables estimation of 1/3 octave-band residual environmental masking-noise spectra and relates certain environmental parameters to A-weighted sound level. This model provides a correlation among three environmental conditions: measured residual A-weighted sound-pressure level, proximity to a major roadway, and population density. Cited field-study data were used to compute the most probable 1/3 octave-band sound-pressure spectrum corresponding to any selected one of these three inputs. In turn, such spectra can be used as an input to models for prediction of noise impacts. This paper discusses specific algorithms included in the newly developed computer program ENMASK. In addition, the relative audibility of the environmental masking-noise spectra at different A-weighted sound levels is discussed, which is determined by using the methodology of program ENAUDIBL.

Physical Description

15 p.

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OSTI as DE00753006

Medium: P; Size: 15 pages

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  • Air and Waste Management 93rd Annual Conference, Salt Lake City, UT (US), 06/18/2000--06/22/2000

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  • Report No.: ANL/EA/CP-101469
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 753006
  • Archival Resource Key: ark:/67531/metadc702626

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  • March 31, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 2:58 p.m.

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Chang, Y.-S.; Liebich, R. E. & Chun, K. C. Development of computer program ENMASK for prediction of residual environmental masking-noise spectra, from any three independent environmental parameters, article, March 31, 2000; Argonne, Illinois. (digital.library.unt.edu/ark:/67531/metadc702626/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.