Sound Shield KitThe new Sound Shield is the only technology of its kind. It significantly reduces sound levels and perceived loudness of the 2502 A and 2503 A families of pumps and compressors without affecting their performance. The result is a quieter, more pleasant working environment that increases user comfort and productivity. Pump And Air Compressor Noise Reduction Sound Shield delivers up to 25% dB(A) drop and a 40% Sone decrease in perceived loudness at open