PAR vs NRR? What are you suppose to trust?
Personal Attenuation Ratings (PAR’s) are designed to give specific attenuation data for an individual. These are done with any non-custom or custom-fit product line and give an evaluation of how […]
Personal Attenuation Ratings (PAR’s) are designed to give specific attenuation data for an individual. These are done with any non-custom or custom-fit product line and give an evaluation of how […]