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Noise Reduction Program for U. S. Army Construction Equipment
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English
Abstract
The U.S. Army Mobility Equipment R&D Center embarked on an overall program to reduce noise of construction equipment as a result of the low noise level requirements established by the Army Surgeon General. Since the level was interpreted to be the overall average noise, it was necessary to measure average noise and define a means of test as well as to design equipment to lowest possible levels.
The initial program was to analyze the source of noise, reduce noise at the source, and provide overall noise reduction treatment to reach lowest practical levels. Similar efforts were then accomplished on several special military vehicles to provide noise reduction retrofit kits.
The initial work revealed special needs in the area of hydraulic system noise, and acoustical materials and in-depth studies were initiated to analyze techniques of hydraulic noise measurement and to evaluate material suitability for military use.
Tests were run on items of construction equipment during actual field operations to develop a system of measuring average noise. The results will be used to evaluate equipment noise in specifying practical levels.
Authors
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Citation
Hopler, P. and Wehr, S., "Noise Reduction Program for U. S. Army Construction Equipment," SAE Technical Paper 740714, 1974, https://doi.org/10.4271/740714.Also In
References
- Hopler P.D. “Managing a Noise Reduction Program for Off-Highway Mobile Construction Equipment.” Nov. 29 1973
- Damotte E. E. “Final Report Noise Level Study.” Caterpillar Tractor Co. Report E70-220 September 1972
- Thien G. E. “The Use of Specially Designed Covers and Shields to Reduce Diesel Engine Noise.” SAE Transactions 82 1973 paper 730244
- Baker R. N. “Noise Control at the Operator's Ear of a Large Army Forklift Truck.” Internoise 74 Washington, D.C. October 1974
- “Final Report of Noise Reduction Study on Army Forklift.” H. L. Blachford, Inc. Report No. 0473
- “Hydraulic System Noise Study.” Oklahoma State University Stillwater December 1973
- Maroney G. E. Elliott L. R. “Hydraulic and Mechanical Factors Affecting Pump Airborne Noise Measurements.” SAE Transactions 82 1973 paper 730874
- “Environmental and Acoustical Test Program on Acoustic Materials.” Dayton T. Brown, Inc. Report DTB03R73-0925
- U.S. Army Human Engineering Laboratory Standard HELS-1-63C
- Kamperman G. W. “Techniques for Describing Operator Noise Exposure for Army Construction and Materials Handling Equipment.”
- Wehr S. E. “Noise Exposure Monitoring on Operators of U.S. Army Construction and Materials Handling Equipment.” Internoise 74 Washington, D.C. October 1974