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® VeriPRO 16 Nov, 2010 Attenuation in dB Real-World Attenuation ≠ NRR 192 users of a flanged reusable earplug ~ 27 NRR 50 NRR = 27 Multiple-Use Earplug 40 30 20 10 0 -10 Retraining and refitting resulted in an average 14 dB improvement for this group 2 From Kevin Michael, PhD and Cindy Bloyer “Hearing Protector Attenuation Measurement on the End-User” “Attenuation provided by hearing protectors to individuals in actual workplace is impossible to predict using any laboratory measurements.” ~ Dr. Kevin Michael Attenuation can be determined at threshold, or above threshold 100 100 90 90 80 80 70 70 60 60 “Real-Ear Attenuation Above Threshold” 30 dB “Real-Ear Attenuation at Threshold” 50 50 40 40 30 30 20 20 30 dB 10 10 VeriPRO allows the user to measure attenuation without interference from background noise levels Test Sequence Part 1: Part 2: Part 3: Both ears unoccluded Right ear occluded Both ears occluded This sets the baseline level for each ear, and measures any asymmetry. Attenuation for the right ear is measured. Attenuation for the left ear is measured. Result ~ Personal Attenuation Rating (PAR) Complete Check ● 5 freqs in each ear ● Includes reliability checks ● ↑ accuracy, ↑ test time Quick Check Report Mode ● 1 critical freq in each ear ● Individual ● ↓ accuracy, ↓ test time ● By freq. ● Can use with severe hrg loss ● Historical Fit Training ● Videos 8 Headline Here 10 User name Test Freq. VeriPRO Step No earplug Earplug inserted Raise slider bar Lower slider bar Adjust the left ear 11 No earplug Earplug inserted Raise slider bar range Adjust left ear volume Lower slider bar range Adjust the left ear 12 Headline What’s New? Here Headline Here Double Arrows Headline Here Headline Here Headline Here VeriPRO Enterprise “Client” version of software has been configured to talk to “Enterprise” version of software VeriPRO Enterprise 1. VeriPRO Testing 2. Data Storage 3. Reporting From each location, VeriPRO sends data to web service Web service processes and delivers data to a server hosted by company VeriPRO Administrators can create group reports on several criteria (location, test dates, earplug tested, etc.) Enterprise Reports Personal Attenuation Ratings: Scattergram Right PAR Left PAR 50 Personal Attenuation Ratings: Distribution 45 20 35 15 30 Number of Tests Attenuation in dB 40 25 20 15 10 5 10 5 0 0 10 20 30 40 50 VeriPRO Users 60 70 80 90 100 0 0 5 10 15 20 25 30 35 Personal Attenuation in dB 40 45 50 22 23 24 25 1. Measures real-world attenuation of any earplug 2. Fulfills requirement to ‘ensure proper fitting’ of earplugs and evaluate their attenuation 3. On-screen training videos 4. Administered anywhere, quiet room not required 5. Protected exposure level and safe exposure level calculated 26 Four Internal Quality Checks 7 dB 500 Hz Retest (Complete Check Only) Rove -10 dB Movement Attenuation 27 28 29 30 31 VeriPRO Implementation 1. Annual employee training 2. New hires 3. Employees with shift in hearing 4. Extreme noise exposures (dual protection) 33 Q&A “Do Howard Leight earplugs test better than others?” “Can custommolded earplugs be used with VeriPRO?” “Can workers with a hearing loss use VeriPRO?” “How reliable is VeriPRO?” “Will calibration of VeriPRO be available?” “Why is 500 Hz tested twice?” “Why did I get a Low Attenuation warning?” 35 Hearing Cons. Program Most use VeriPRO to select and document earplugs for each worker. Workers Tested Users focus on workers with STS, extreme noise exposures. Earplug Selection Through fit testing, most workers now use a different earplug. Real-World Studies 2007-2009 Field Testing with VeriPRO ● 8 locations - no pre-screening of workers ● 100 workers tested ● Casual test setting - HPD selected by worker - “insert as usual” - training feedback disabled Variation from Published NRR 10 Published NRR 0 -5 -10 -15 -20 -25 Distribution -30 0 10 20 30 12 40 50 60 70 80 90 100 10 Workers 8 Workers Difference in dB 5 6 4 2 0 -30 -25 -20 -15 -10 -5 0 5 10 Variation from Published NRR 15 20 25 30 Pilot Study Pre and Post-Test “How well can users predict their attenuation after a short fit-testing training session?" 43 Pilot Study Pre and Post-Test Self-Efficacy “How much noise do you think your earplugs block?” 76% (13 of 17) judged attenuation as HIGHER post-test 44 Pilot Study Results Data show improved PARs! Initial Final RE=19 RE=29 LE=22 LE=27 Average improvement 7.5 dB 45 Pilot Study Pre and Post-Test Post-Test Are you better able to assess the effectiveness of your earplugs after VeriPRO fit-testing? 1 2 3 4 5 No Maybe No change Improved Yes 64% (11 of 17) rated their ability HIGHER post-test 46 Pilot Study Pre and Post-Test Post-Test Ability Initial Ability Expert Expert Pretty good I do OK I do OK Don't know how Not good Pretty good I do OK Pretty good Expert Fitter 47 Pilot Study Pre and Post-Test Ability to Predict Noise Reduction (Each subject estimated atten. for each ear) Number of Ears 20 18 56% 16 14 12 10 32% 8 6 4 12% 2 0 Within 5 dB category +/- 7.5 dB +/- 12.5 dB (one Category off) (2 categories off) 48 Current NRR Label Mock-up of New Label