Relevant test methods for establishing sound power levels of powered hand tools

High rates of noise induced hearing loss among construction workers provides the motivation for providing noise exposure level information to users and purchasers of powered hand tools. This paper describes relevant sound power level test methods necessary to estimate a tool user’s noise exposure. The data are summarized here while detailed test results are posted on a National Institute for Occupational Safety and Health (NIOSH) website database, searchable by tool types, make, and model. The tools database also links directly to the NIOSH Hearing Protector Device Compendium, recommending the appropriate hearing protection for the given noise exposure. Measuring the sound power level in both the loaded and unloaded conditions and reporting the greater value is appropriate for the intended use of providing the relevant data to be used in making purchasing decisions and choosing correct hearing protection. While these researchers tested tools in both the loaded and unloaded conditions, much of the testing in the loaded condition required development of test jigs, methods, and procedures not detailed in existing test standards. It is recommended that efforts be initiated to develop standardized test jigs and methods, such as detailed here, so noise emission levels of power tools can be determined in a relevant and uniform manner from lab to lab.