Noise from vibrating screens is generated in two ways: (1) noise due to the material being processed, and (2) noise from the screen itself. Non-metallic decks have reduced material noise. The noise reduction and change in screening performance was quantified for six nonmetallic decks using dolomite, granite, and coal as the materials. The nonmetallic decks were from 2 to 7 dba quieter and from -1 to +10 percent less efficient compared with a steel wire cloth deck of the same open area. Damping the sidewalls and isolating the drive mechanisms has reduced the noise in the screen itself. Tests of four prototype damping treatments gave reductions up to 4.9 Dba, and the mechanism isolators gave an additional reduction of 2.1 Dba. Laboratory tests were conducted on samples of the treatments in a corrosive salt spray to simulate coal plant wash water up to 25,000 hours, and full-size treatments were run on a full-size screen for 5,000 hours.