The most important thing
to remember about Plugfones is that they're earplugs first and earbuds
second. As such, the entire Plugfones line is tested and compliant with
ANSI S3.19-1974 noise reduction standards and meets NIOSH criteria. When
used as directed, our products are certified for Noise Reduction
Ratings (NRR) of 23 or 26 dB, depending on the plugs used. For
environments with high levels of noise, it may be necessary to use over
ear protection such as earmuffs in conjunction with Plugfones products.