The function of this Sonic Ear Valve is not necessarily to attenuate sound but to obstruct and dissipate the harmful energy component of loud high-volume noise. Thus letting one hear everything while removing the harm of nerve shattering noise.
This revolutionary ear valve provides proven hearing protection and is available in a universal size which fits practically all ear canals. (small and large sizes are available for abnormally sized ear canals). Features: The entire valve is enclosed in silicone. Packaged in tiny, convenient carrying case. NRR - 6.0.
Product URL : http://www.halhen.com/cgi-bin/info.cgi?id=2170&ls=
Last Updated : 03/16/2013