TREE-COVERED LAND-FORMS FOR NOISE CONTROL
Combinations of trees, shrubs, and solid barriers are effective means for shielding sensitive areas from intrusive noise. Reductions of sound levels in the order of 10 to 15 decibels (less than half as loud) are common for 12-foot- high land-forms combined with wide belts of tall trees. Greater reductions have been observed in many instances. Either trees or solid barriers may be used separately, but the combination tends to provide more uniform control for a greater distance than does either one alone. Screening is effective only when the noise source is hidden from view at the protected area, and the effectiveness increases as the height of the screen is increased. Optimum heights are suggested for several applications, and brief instructions for establishing trees and shrubs on land-forms have been included.
University of Nebraska, LincolnCollege of Agriculture
Lincoln, NE USA 68503
- Cook, D I
- Van Haverbeke, D F
- Publication Date: 1974-7
- Pagination: 47 p.
- TRT Terms: Noise barriers; Noise control; Shrubs; Sound level; Traffic noise; Trees
- Subject Areas: Highways; Safety and Human Factors;
- Accession Number: 00262296
- Record Type: Publication
- Report/Paper Numbers: Res Bull 263
- Files: TRIS
- Created Date: Nov 12 1974 12:00AM