AGMA 299.01 : REV 0 : R1994

Part I Fundamentals of Sound as Related to Gears<br>1. What is Sound?<br>2. Description of Sound<br>&nbsp;&nbsp;&nbsp;&nbsp;2.1 <br>&nbsp;&nbsp;&nbsp;&nbsp;2.2 Level<br>&nbsp;&nbsp;&nbsp;&nbsp;2.3 Frequency Content<br>&nbsp;&nbsp;&nbsp;&nbsp;2.4 Descriptive Properties<br>3. Sound or Noise?<br>4. Generation of Sound in Gear Units<br>5. Sound Transmission<br>6. Noise Control<br>Part II Sources, Specifications, and Levels of Gear Sound<br>1. Scope<br>&nbsp;&nbsp;&nbsp;&nbsp;1.1 Gear Sound Generation<br>2. Source<br>&nbsp;&nbsp;&nbsp;&nbsp;2.1 Basic Relationships<br>&nbsp;&nbsp;&nbsp;&nbsp;2.2 Frequency Origins<br>&nbsp;&nbsp;&nbsp;&nbsp;2.3 Common Frequencies<br>&nbsp;&nbsp;&nbsp;&nbsp;2.4 System Frequency Range<br>&nbsp;&nbsp;&nbsp;&nbsp;2.5 Typical Sound Investigation<br>&nbsp;&nbsp;&nbsp;&nbsp;2.6 Sound Spectrum Experience<br>3. Specifications and Standards<br>&nbsp;&nbsp;&nbsp;&nbsp;3.1 Specification Sources<br>&nbsp;&nbsp;&nbsp;&nbsp;3.2 AGMA Sound Standards<br>4. Gear System Sound Levels<br>&nbsp;&nbsp;&nbsp;&nbsp;4.1 Typical Levels<br>&nbsp;&nbsp;&nbsp;&nbsp;4.2 AGMA Typical Maximum Data<br>Part III Gear Noise Control<br>1. Scope<br>&nbsp;&nbsp;&nbsp;&nbsp;1.1 Source Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;1.2 System Dynamics<br>&nbsp;&nbsp;&nbsp;&nbsp;1.3 Design for Environment<br>2. Gear Design Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;2.1 Influence Factors<br>&nbsp;&nbsp;&nbsp;&nbsp;2.2 Gear Tooth Overlap<br>&nbsp;&nbsp;&nbsp;&nbsp;2.3 Optimum Tooth Geometry<br>&nbsp;&nbsp;&nbsp;&nbsp;2.4 Practical Design Chances<br>3. Gear Housing Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;3.1 Surface Excitations<br>&nbsp;&nbsp;&nbsp;&nbsp;3.2 Frequency Determination<br>&nbsp;&nbsp;&nbsp;&nbsp;3.3 Constrained Layer Damping<br>4. Bearing Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;4.1 Alignment of Bearing<br>&nbsp;&nbsp;&nbsp;&nbsp;4.2 Rolling Element Noise<br>&nbsp;&nbsp;&nbsp;&nbsp;4.3 Sleeving Bearing Noise<br>5. Shaft and Hub Design Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;5.1 Runout Noise<br>&nbsp;&nbsp;&nbsp;&nbsp;5.2 Gear Blank Resonance<br>6. Lubrication Noise Control<br>&nbsp;&nbsp;&nbsp;&nbsp;6.1 Lubricant Viscosity<br>&nbsp;&nbsp;&nbsp;&nbsp;6.2 Fluid Noises<br>7. Noise Control with System Analysis<br>&nbsp;&nbsp;&nbsp;&nbsp;7.1 Analysis for Resonance<br>&nbsp;&nbsp;&nbsp;&nbsp;7.2 Coupling Considerations<br>&nbsp;&nbsp;&nbsp;&nbsp;7.3 Connected Equipment Analysis<br>8. Noise Control of Gear Unit Accessories<br>&nbsp;&nbsp;&nbsp;&nbsp;8.1 Lubrication System Noise<br>&nbsp;&nbsp;&nbsp;&nbsp;8.2 Cooling Fan Noise<br>9. Noise Control in the Transmission Path<br>&nbsp;&nbsp;&nbsp;&nbsp;9.1 Minimize Transmission<br>&nbsp;&nbsp;&nbsp;&nbsp;9.2 Sound Absorption<br>&nbsp;&nbsp;&nbsp;&nbsp;9.3 Economic Sound Reduction<br>10. Control with Vibration Isolation<br>&nbsp;&nbsp;&nbsp;&nbsp;10.1 Structure-Borne Noise Reduction<br>11. Noise Control Materials<br>&nbsp;&nbsp;&nbsp;&nbsp;11.1 General Materials<br>&nbsp;&nbsp;&nbsp;&nbsp;11.2 Material Selection<br>&nbsp;&nbsp;&nbsp;&nbsp;11.3 Panel Location<br>12. Total Enclosures<br>&nbsp;&nbsp;&nbsp;&nbsp;12.1 Enclosure Economics<br>&nbsp;&nbsp;&nbsp;&nbsp;12.2 Enclosure Structures<br>&nbsp;&nbsp;&nbsp;&nbsp;12.3 Effective Enclosures<br>&nbsp;&nbsp;&nbsp;&nbsp;12.4 Disadvantage<br>&nbsp;&nbsp;&nbsp;&nbsp;12.5 Enclosure Operator<br>&nbsp;&nbsp;&nbsp;&nbsp;12.6 Other Solutions<br>13. Summary<br>&nbsp;&nbsp;&nbsp;&nbsp;13.1 Gear Sound Manual<br>&nbsp;&nbsp;&nbsp;&nbsp;13.2 Compatible Methods

Discusses how noise measurement and control depend upon the individual characteristics of the prime mover, gear unit, and driven machine as well as their combined effects in a particular acoustical environment. Indicates certain areas that might require special consideration.