As recognized leaders in the acoustic silencing industry, Universal’s staff has the knowledge and experience to provide information about noise control to engineers who work in plants and other settings where noise control is an issue. Universal’s Silencer Application Handbook or the Green Book, as it is known in the industry, is a well-used reference guide for acoustical engineers.

Green Book Synopsis

The Green Book introduces the application engineer to industrial noise control and reduction as it applies to engines, turbines, blowers, compressors, vacuum pumps, vents, blowdowns and fans. These are but a few of the major sources of plant and process noise caused by aerodynamic sources, gaseous fluids such as air, steam and natural gas. Plant and area noise of this type depend on many things, including the type and number of sources, equipment speed (rpm), process pressures and the economy of layout and construction. A noise analysis, however complex. should be included in the initial planning and engineering of a new plant or facility. Failure to understand or recognize the complications that may be caused by legal requirements or neighborhood response to excessive noise can cost money and time at a later date.

Green Book Table of Contents

Silencer Application Handbook

• Forward
• Professional Profiles
• List of Figures
• List of Tables

1. Introduction
2. Fundamentals
3. Noise Criteria
4. Types of Noise Reduction
5. Silencer Performance
6. Silencer Applications and Noise Sources
   1. Internal Combustion Reciprocating Engines
   2. Gas Turbines
   3. Rotary Positive Displacement Blowers
   4. Vacuum Pumps
   5. Centrifugal Air Blowers and Compressors
   6. Reciprocating Air Compressors
   7. Vents and Blowdowns to Atmosphere
   8. Pressure Regulators
   9. Centrifugal Fans (Industrial-Type)

• Appendix
• Glossary