Variation In Noise Measurements Of Power Tools Used In Construction PDF Download

ABSTRACT: Construction workers and their supervisors need accurate noise level information about their power tools and equipment, so they can make appropriate decisions regarding the use of hearing protection. If they rely on unrealistic measurements of decibel levels, they are in danger of contributing to permanent hearing loss. As the public becomes increasingly concerned about noise levels from construction worksites and medical costs are increasing from hearing related claims, governments and industry leaders are incorporating noise limitations in their contracts. In addition, government agencies such as National Institute for Occupational Safety and Health (NIOSH) are attempting to address the need for standardized noise measurements of power tools and equipment, the most significant contributors to noise on a jobsite. However, the methods for measuring noise levels are sometimes unrealistic, resulting in inadequately protected workers regardless of the appearance of adequate hearing protection in compliance with Occupational Safety and Health Administration (OSHA) standards. What is needed and addressed in this research is a more accurate understanding of the actual noise level reaching the worker's ear when, for example, the worker is using a hammerdrill in a small enclosed environment while another worker is working alongside with a circular saw. In cases such as this, the commonly used method of measuring the decibel level of a single tool in a sound laboratory is unhelpful. The result is unfortunate for the worker and any bystanders, who may be basing the noise reduction ratings of their hearing protection devices on this unrealistic decibel rating.