Comparison of sound power levels of powered hand tools tested under loaded and unloaded conditions.
Zechmann-EL; Hayden-CS II
Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii. West Lafayette, IN: International Institute of Noise Control Engineering, 2007 Aug; 2:774-783
Most electrically powered hand tools are specified in ANSI Standard S12.15 to have sound power levels measured while the power tool is in the unloaded condition (full-speed, no load or just simply idling). In an effort to properly define noise sources and levels on construction sites, sound power level data was gathered in both the loaded and unloaded condition from a variety of electrically powered hand tools. This paper compares the differences in the magnitude of the sound power level data and discusses whether existing test standards are in harmony with the reasons that we measure and subsequently use that data. On average for all tools tested, there is a 4.1 dBA increase in sound power level when the power tool is tested in the loaded condition compared to testing in the unloaded condition. In order to provide relevant data, specific recommendations are made to revise existing ANSI Standard S12.15. The recommendations include specifying loaded conditions for testing, standardization of test jig setup and work piece material size and type.
Noise; Noise-levels; Mathematical-models; Work-environment; Power-tools; Hand-tools; Sound; Exposure-assessment; Noise-measurement; Noise-sources; Construction; Construction-equipment; Electrical-equipment; Standards
Edward L. Zechmann, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, C27, Cincinnati, OH 45226
Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii.