TWA Calculator v2.0 Beta Download

TWA CalculatorTWA 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.

When used with a computer projector system, a computer using the TWA Calculator application can display these concepts to large groups in a classroom environment. Noise exposure scenarios may be created in Microsoft Excel format and imported into TWA Calculator, and those created in the application may be exported, saved, edited and re-imported. This feature makes TWA Calculator the ideal self-study aid for independent learning and practice and enhances its use in homework exercises. A built-in screen capture function facilitates the use of the application for preparing class notes, exams and other written materials.

TWA Calculator may also be used in a hearing conservation program management context to evaluate employee total daily noise exposure dose and TWA from monitoring data and make decisions regarding the need for program enrollment and personal hearing protector use as well as the implementation of administrative and engineered controls. TWA Calculator may be used as a desk-top calculator and graphic display to illustrate employee-specific noise exposure scenarios in a patient counseling environment.

TWA Calculator was developed using National Instruments LabVIEW™ v8.2.1 and requires a corresponding LabVIEW™ Run-time Engine to be present on the User’s computer. (Download the Run-time Engine for free. ) A PC running Windows® 2000, Windows® XP or Windows Vista® is required. Windows® 7 has not yet been tested. Mac OS X is not supported.

TWA Calculator was produced by the NASA EARLAB Auditory Demonstration Laboratory, with application development contracted to Nelson Acoustics .

Download TWA Calculator v2.0 (beta) Now

By clicking the button below, you affirm agreement with the following conditions:

  • I will not redistribute TWA Calculator.
  • I will not incorporate TWA Calculator in whole or part into any product, Web site, or other media that is redistributed or resold.
  • I understand that I am solely responsible for the careful and informed application and use of TWA Calculator, including the review and interpretation of all output quantities, and for appropriately limiting its use to instructional purposes.

TWA Calculator v2.0 (85 MB .zip file)

TWA Calculator User Guide Version 2.0 (377 KB) PDF file

Posted in

amy

Scroll to Top