Noise Rating (NR) and Noise Criteria (NC)
Background A method of rating noise for indoor environments (NR Curves) was developed by the International Standards Organization (ISO) for... View Article... Read More »
Tag Archive: nc curves
Background A method of rating noise for indoor environments (NR Curves) was developed by the International Standards Organization (ISO) for... View Article... Read More »
CLICK HERE FOR
Information, technical data, images and pricing of all Castle Group Ltd. products
CLICK HERE FOR
Hire the best equipment at a fraction of the purchase price
CLICK HERE FOR
Calibration and repair services from Air Samplers to Vibration Meters
CLICK HERE FOR
World class safety and environmental courses. On your site or our 4* training facility
CLICK HERE FOR
Employ our expertise for both simple and more demanding issues.
