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 1 New system for monitoring exposure to impulsive noise
Authors Kardous-CA; Murphy-WJ 
Source Inter-Noise 2005. The 34th International Congress and Exposition on Noise Control Engineering, 07-10 August 2005, Rio de Janeiro, Brazil. West Lafayette, IN: International Institute of Noise Control Engineering, 2005 Aug; :1-9 
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NIOSHTIC No. 20028238 
AbstractThe U.S. National Institute for Occupational Safety and Health (NIOSH) developed a measurement and analysis system for accurately capturing and monitoring exposure to impulsive noise. The system consists of a Type 1, high intensity measurement microphone, a 24-bit data acquisition board with 96 kHz sampling rate, and a software tool that uses a graphical user interface (GUI) built in MATLAB to display the time domain waveform, frequency spectrum, and (1/1) and (113) octave band spectra of the captured impulse noise event. Additionally, parameters such as peak pressure level, equivalent average level, kurtosis, time duration, number of impulses, and temporal spacing between impulses are also calculated and displayed. An impulse detection routine was developed to aid in the location and analysis of impulsive events. Once the impulsive events have been identified, the program uses the three major damage risk criteria in use today (LeqA-8hr, MIL-STD 1474D, and Price/Kalb Auditory Hazard Units) to determine the limits for exposure to a particular impulsive noise event. 
KeywordsNoise; Noise-measurement; Impulse-noise; Monitoring-systems; Exposure-levels; Equipment-design; Acoustic-trauma; Hearing-loss 
ContactNational Institute for Occupational Safety and Health, Division of Applied Research and Technology, 4676 Columbia Parkway, Cincinnati, OH 45226 
Publication Date20050807 
Document TypeConference/Symposia Proceedings 
Email Addressckardous@cdc.gov 
Fiscal Year2005 
NTIS Accession No. 
NTIS Price 
NIOSH DivisionDART 
Source NameInter-Noise 2005. The 34th International Congress and Exposition on Noise Control Engineering, 07-10 August 2005, Rio de Janeiro, Brazil 
StateOH 
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