Material Detail

TWA Calculator

TWA Calculator

'TWA Calculator is a computational and visual tool for teaching noise exposure dose concepts in an occupational hearing conservation context. TWA Calculator enables the user to easily create daily noise exposure scenarios from a series of component exposure events. TWA Calculator demonstrates the relationship between sound level, duration, and partial dose for each component exposure as well as their effect on the total dose and 8-hour noise exposure quantities [OSHA/MSHA Time-Weighted Average (TWA) and NIOSH LAeq,8], using both OSHA/MSHA and NIOSH values for criterion and exchange rate. Real-time changes in input data and calculated parameters are displayed graphically and numerically. In an educational setting, a computer using TWA Calculator (when used with a computer projector system or... Show More


More about this material


Log in to participate in the discussions or sign up if you are not already a MERLOT member.