noise mitigation barrier
Download
Skip this Video
Download Presentation
NOISE MITIGATION - BARRIER

Loading in 2 Seconds...

play fullscreen
1 / 11

NOISE MITIGATION - BARRIER - PowerPoint PPT Presentation


  • 111 Views
  • Uploaded on

NOISE MITIGATION - BARRIER. To mitigate noise in exterior recreation areas: Rearrange site (potentially provides both distance and barriers) Put up a noise-specific barrier

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' NOISE MITIGATION - BARRIER' - stash


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
noise mitigation barrier
NOISE MITIGATION - BARRIER
  • To mitigate noise in exterior recreation areas:
    • Rearrange site (potentially provides both distance and barriers)
    • Put up a noise-specific barrier
  • If there are existing barriers such as buildings or topographic features between project site and noise source, first evaluate whether they provide sufficient mitigation
  • Mitigation should be in direction of main noise source(s)
noise mitigation barrier1
NOISE MITIGATION - BARRIER
  • To be effective, barrier must:
    • Interrupt line of sight between noise source and receptor
    • Be continuous, and extend to the ground surface
    • Be of a material that will absorb sound energy
      • When considering wooden fences as barriers, incorporate an air space between two continuous fence surfaces to increase effectiveness
      • Noise Guidebook has Transmission Loss Values for evaluating the relative effectiveness of various materials
noise mitigation barrier3
NOISE MITIGATION - BARRIER
  • To evaluate barrier, need to know:
    • Observer elevation
    • Noise source elevation
    • Current and projected noise levels
    • Elevation of the top of the barrier
    • Distance, observer to barrier
    • Distance, barrier to source
    • Angle subtended by barrier
noise mitigation barrier4
Sample site:

Observer elevation: 525 ft

Source elevation: 514 ft

Current noise level: 71.83 dB

Projected noise level: 72.38 dB

Barrier top elevation: 546 dB

Observer-barrier distance: 141 ft

Barrier-source distance: 523 ft

Barrier angle: 95 degrees

NOISE MITIGATION - BARRIER
noise mitigation barrier5
NOISE MITIGATION - BARRIER
  • Follow calculations in Noise Guidebook Workchart 5
noise mitigation barrier6
NOISE MITIGATION - BARRIER
  • Refer to Workchart 6 and Workchart 7 in guidebook as directed by Workchart 5 to complete evaluation
noise mitigation barrier7
NOISE MITIGATION - BARRIER
  • To improve barrier performance without changing dimensions:
    • Move closer to observer – increases effective angle of barrier
    • Angle ends toward observer – also increases effective angle
    • Angle top toward source – increases effective height of barrier
ad