Introduction Study Area Helicopters Methodology Results Conclusions Suggestions References Acknowledgements Appendix 1 Appendix 2 Appendix 3 Appendix 4 Appendix 5	Appendix 1. Photos of the Sound Measurment effort for the "Moon 25" and "Cedar House" Timber Sales.   Photo 1. Moon 25 timber sale, log landing #2 site. Helicopter approach is from the opening in the background.
Photo 2. Moon 25 timber sale, log landing #2 - log load being delivered.   Photo 3. Moon 25 timber sale, log landing #2. 1st recorder (facing away from landing) taking measurements (137 feet east of the landing).   Photo 4. Moon 25 timber sale - 2nd recorder (242 feet east of log landing #2). Recorder is facing landing.   Photo 5. Moon 25 timber sale. 3rd recorder facing away from landing. (394 feet SE of log landing #2).   Photo 6. Cedar House timber sale, service landing for the Boeing Vertol 107.   Photo 7. Cedar House timber sale. 1st recorder taking sound measurment at lower log landing.   Photo 8. Cedar House timber sale. Third sound recorder taking sound measurements at lower log landing. Recorder is facing landing.