Grainger acoustic screen pn 5T512, noise reduction is not measured in NRR. These acoustic sound barriers will each offer a noise reduction coefficient (NRC), in this case the 5T512 has an NRC of .75 acoustical performance. In order to determine the exact noise reduction rating any engineer controlled product can provide would depend on the placement of the screen in relation to the piece of equipment. For more information on acoustical screens and other noise barrier products please see Grainger Quick Tips Document number 382.
Thank you for using Grainger Ask and Answer.