1. Disclaimer: The findings and conclusions in this presentation are those of the author(s) and do not necessarily represent the views of the National Institute for Occupational Safety and Health (NIOSH). Mention of company names of products does not constitute endorsement by the Centers for Disease Control and Prevention (CDC) or NIOSH. Development of a Virtual Instrument for Acoustic Research LCDR Edward Zechmann, M.S. Dept of Health and Human Services US Public Health Service Centers for Disease Control and Prevention National Institute for Occupational Safety and Health

2. Overview Demonstration of the Sound Power VI Calibration –Microphones –Accelerometers Data Acquisition –Manual Mode –Automated Mode Post Processing –Conversion to Matlab Format –Reprocessing of Binary Files Conclusions Feasibility of Sound Power, Impulsive Noise, and Hand-Arm Vibration Measurements

3. Run Demonstration 1.The Sound Power VI will take over the screen 2.Microphones and Accelerometers will be calibrated 3.Extended Time records and short time records will be acquired for sound and vibrations 4.Extended Time records will be post processed Conversion to Matlab format Sound and hand arm vibrations data metrics

4. Conclusions Successfully Calibrated 1.Microphone 2.Accelerometer Acquired Data 1.Manual Mode 2.Automated Mode 3.Time Record Postprocessed Sound and Vibrations Data 1.Converted to Matlab Format 2.Reprocessed Binary Files

5. Thank You Hearing Loss Prevention Website www.cdc.gov/niosh/topics/noise/ Power Tools Sound Power Database wwwn.cdc.gov/niosh-sound-vibration/ Hearing Protector Compendium www2a.cdc.gov/hp-devices/hp_srchpg01.asp Edward Zechmann cri6@cdc.gov