Estimation of sound pressure level exposures from sound power level measurements of powered hand-tools
| Autor: | Charles S. Hayden, Edward L. Zechmann |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Engineering
Acoustics and Ultrasonics Microphone business.industry Mechanical Engineering Acoustics Public Health Environmental and Occupational Health Electrical engineering Aerospace Engineering Building and Construction Sound power Industrial and Manufacturing Engineering Power (physics) Hearing protection Noise exposure Construction industry Automotive Engineering Noise control business Sound pressure |
| Zdroj: | Noise Control Engineering Journal. 55:379 |
| ISSN: | 0736-2501 |
| DOI: | 10.3397/1.2750437 |
| Popis: | As part of a long-term goal to reduce noise-induced hearing loss in the construction industry, the National Institute for Occupational Safety and Health (NIOSH) estimated the A-weighted sound pressure level at the operator's ear (L pA,est ) from the A-weighted sound power (L WA ) measurements of 118 various model powered hand tools using the diffuse-field point source model Eyring theory. L pA,est from the model are compared to sound pressure measurements (L PA,meas ) acquired from a microphone located in the nominal hearing zone of a simulated powered hand tool operator. This paper provides a basis for the direct substitution of L WA for L pA,meas and a comparison of L pA,est to L PA,meas . The magnitude of L WA is found to be a reasonable predictor of the magnitude of sound pressure level exposure, or L PA,meas , that a powered hand tool operator might experience across a variety of acoustical environments. As such, L WA can be used directly to select appropriate hearing protection and estimate worker' noise exposure. L WA can be measured for all power tools with appropriate loading conditions; however, measuring the sound pressure levels for all combinations of powered hand tools and acoustical environments in the construction industry is not feasible. Purchasers and users of those tools deserve a viable method of estimating noise exposure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|