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Analysis of Industrial Noise for Hearing Conservation.

PB2004105288

Publication Date	1997
Personal Author	Lei, S. F.
Page Count	34
Abstract	Noise measurements made for the purpose of hearing conservation practice, have as their objective the extraction of some physical metric from the noise that can be used to estimate the hazards to hearing from prolonged exposure to that noise. Unlike other areas of environmental monitoring, the substantive aspects (as opposed to the purely technological) of noise measurement practice have not evolved with the improvements in signal analysis capabilities. This research grant was originally conceived as a result of the inadequacy of current measurements to deal with complex noise measurements. Its primary objective was the broadly stated goal of using relatively new signal analysis techniques to extract metrics from a continuously sampled acoustic signal that can be used in conjunction with or as an alternative to the traditional metrics to provide a more adequate assessment of the hazard of a noise measurement. The following metrics, that can be used to quantify industrial noises, were developed as a result of this grant: (1) Frequency domain kurtosis (FDK), on any preselected frequency scale, provides an indication of which regions of the energy spectrum undergo fluctuations and the extent of these fluctuations relative to Gaussian conditions, (2) The joint peak-interval histogram which will identify each impulsive level, within a predetermined peak bin, with its interpeak interval distribution. From this surface conventional peak and interval histograms have been obtained.
Keywords	Noise measurement Industrial noise Occupational noise Hazards Monitoring Signal processing Algorithms Hearing conservation
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	State Univ. of New York Coll. at Plattsburgh. Auditory Research Lab.; National Inst. for Occupational Safety and Health, Washington, DC.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
Title Note	Rept. for 30 Sep 94-29 Sep 97.
NTIS Issue Number	200418
Contract Number	NIOSH-1-K01-OH00139

Analysis of Industrial Noise for Hearing Conservation.

Analysis of Industrial Noise for Hearing Conservation.
PB2004105288

Publication Date	1997
Personal Author	Lei, S. F.
Page Count	34
Abstract	Noise measurements made for the purpose of hearing conservation practice, have as their objective the extraction of some physical metric from the noise that can be used to estimate the hazards to hearing from prolonged exposure to that noise. Unlike other areas of environmental monitoring, the substantive aspects (as opposed to the purely technological) of noise measurement practice have not evolved with the improvements in signal analysis capabilities. This research grant was originally conceived as a result of the inadequacy of current measurements to deal with complex noise measurements. Its primary objective was the broadly stated goal of using relatively new signal analysis techniques to extract metrics from a continuously sampled acoustic signal that can be used in conjunction with or as an alternative to the traditional metrics to provide a more adequate assessment of the hazard of a noise measurement. The following metrics, that can be used to quantify industrial noises, were developed as a result of this grant: (1) Frequency domain kurtosis (FDK), on any preselected frequency scale, provides an indication of which regions of the energy spectrum undergo fluctuations and the extent of these fluctuations relative to Gaussian conditions, (2) The joint peak-interval histogram which will identify each impulsive level, within a predetermined peak bin, with its interpeak interval distribution. From this surface conventional peak and interval histograms have been obtained.
Keywords	Noise measurement Industrial noise Occupational noise Hazards Monitoring Signal processing Algorithms Hearing conservation
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	State Univ. of New York Coll. at Plattsburgh. Auditory Research Lab.; National Inst. for Occupational Safety and Health, Washington, DC.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
Title Note	Rept. for 30 Sep 94-29 Sep 97.
NTIS Issue Number	200418
Contract Number	NIOSH-1-K01-OH00139