Home > Get Involved > Volunteer Groups > Hazard Prevention and Engineering Controls Committee > Noise Noise Page Content Fan Sound Criteria, Attenuation Techniques, and Preventive Measures to Limit Sound Problems This article contains descriptions of the most common fan sound criteria and the approaches used to attenuate sound if the criteria are not satisfied. Also included are some common sense approaches to making sure the likelihood of sound problems is minimized. Other articles from this website cover common fan technical topics. NIOSH Power Tools Database NIOSH has measured the sound and vibration level for different power tools/manufacturers, and the data is available on their website. Good resource to compare power tools and determine which are inherently less noisy by design.