EARTH BERMS AND THEIR ACTUAL AND PERCEIVED EFFECTS ON NOISE AND PRIVACY IN ADJACENT NEIGHBORHOODS

The purpose of this paper is to compare and assess the measured and calculated attenuations obtained from earthen sound berms and also to assess the perceived effects of selected berms on adjacent residential neighborhoods by means of an attitudinal survey. Simultaneous sound readings were taken before and after construction of the berms. It was found that they produced median sound-level attenuations of 5 dB(A) at the right-of-way line and 3 dB(A) at a distance corresponding to the front sidewalk of the homes along the freeway. The attitudinal survey, conducted before and after the construction of sound berms, indicated that residents immediately adjacent to the freeway perceived a reduction in sound levels and increased privacy both indoors and outdoors. The study concluded that even minor attenuations of freeway noise of 5 dB(A) or less are discernible within adjacent neighborhoods and, based on the subjective responses of the attitudinal survey, are perceived to be greater than actually measured. Also, the increased privacy afforded by sound berms should be a consideration in the evaluation of proposals for the construction of future sound-attenuating devices. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 23-29
  • Monograph Title: Geometrics, hydraulics, and hydrology
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00196650
  • Record Type: Publication
  • ISBN: 0309028302
  • Files: TRIS, TRB
  • Created Date: Sep 15 1979 12:00AM