Additional swappable filters for the Pro Series earplugs. The price is for one set of filters. Generally, the higher the filter level the more attenuation and the noisier the environment in which you use it. Generally, the higher the filter level the more attenuation/protection provided, and the noisier the environment in which you use it. 10dB – for vocalists, orchestras and small ensembles 15dB – for acoustical performers, orchestra woodwind/brass, dentists 17dB *Most versatile filter* – for amplified bands, concert-goers, DJs, sound engineers, factory workers, railway workers, airport workers, aviation workers, pilots 20dB – for orthopedic surgeons, theatre nurses, dentists, factory workers 26dB – for very loud bands, drummers, music venue staff, helicopter pilots, aviation workers (very loud noise), factory workers 27dB – construction, manufacturing, tradework, loud industrial noise, clear communication
