1. SURFACE NOISE CONTROLS

2. Source Path Receiver

3. NOISE EXPOSURE CAN BE REDUCED BY:  APPLYING CONTROLS TO THE SOURCE (S)  BLOCKING THE PATH (S)  ENCLOSING THE RECEIVER

4. BARRIERS ON DRILL MASTS

5. DRILL EXHAUST MUFFLERS

6. HAMMER COVERS Conveyor Belting Over a Hammer

7. DrillBarrier Shadow Zone Operator

8. HOMEMADE BARRIERS FOR DRILL OPERATORS

9. THREE SIDED ENCLOSURE

10. OPERATOR CONSTRUCTED CABS

11. Former Farm Equipment Cab Converted To A Portable Crusher Booth

12. Original Equipment Manufacturers Cabs

13. OPERATOR & HELPER CABS CABS

14. INTERIOR RETROFIT

15. FLOOR TREATMENT VIBRATION DAMPING ACOUSTICAL FLOORMAT FLOOR TREATMENT VIBRATION DAMPING ACOUSTICAL FLOORMAT

16. AFTER MARKET SKIN KIT

17. THE HOPPER IS MONITORED FROM THE CONTROL BOOTH Camera

18. OPERATOR CONSTRUCTED ENGINE COVER

19. Maintain Your Noise Controls  Exhaust components should be inspected and repaired when needed  Barriers should be cleaned and inspected  Acoustical materials should be replaced when worn or removed for servicing  Cabs or booths should be maintained  Engine covers should remain on when in use

20. Additional Resources www.msha.gov/1999noise/Guides/SurftotalFinal.pdf

21. Your children can whisper to you now, Don’t make them shout at you in the future