Issue link: http://read.dmtmag.com/i/30867
SAFETY PRODUCTS ProStar Hearing Protection ™ ProStar Impulse Active Listening Ear Muffs Part Number PRS67000 Amplifiesnlownlevelnsoundnbyn upnton16dBnwhilenlimitingnthen speakernoutputntonansafen85dB,ndualn microphones,nvolumencontrol,nandn speakersnfornnaturalnhearing,nrequiresn 2nAAAnbatteries.nNRRn22dB. ProStar Basic Ear Muffs Part Number PRS67001 Ergonomicnhearingnprotector,n lightweight–lessnthann8noz.n(237ng).n Earncupsncontournindividuallyntoneachn earnfornoptimalnfit,nadjustablen3-positionn headbandncannbenwornnovernhead,n behindnheadnornundernchin.nNRRn21dB. ProStar Original Ear Muffs Part Number PRS67005 Economicaln3-positionnheadband,n adjustablenearncupsnwithnsoftnfoam- fillednearncushions.nNRRn25dB. When to Use Hearing Protection Hearing Safety Tip The first step in caring for your hearing protection is to inspect them for any signs of torn edges, cracks, or broken pieces. Parts that are torn or broken off should be replaced before using them again. When is workplace hearing protection needed? The OSHA permissible exposure limit (PEL) is 90dB over an eight-hour period. The actual level, however, is 85dB. That means that if a time-weighted average noise level exceeds 85dB, you need a hearing conservation program. Shorter time periods allow higher noise levels – but exposure to noise levels of 115dB or higher require hearing protection. What is NRR? The NRR, or Noise Reduction Rating, of a hearing protection device is the amount of decibels by which it will reduce noise exposure. For example, if a worker was exposed to 100dB of noise and was given a pair of ear plugs with a NRR of 25dB, that worker would be exposed to a time-weighted average of 82dB, or [100dB - (NRR-7)]. E18