Noise barrier with grade changes?

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Lila Guizado

March 23, 2023 15:57

When comes to noise barriers, the site planning and design handbook notes that a barrier is best when its closest to the source.

What about using grade changes as the sound barrier?

Chapter 7, page 237 talks about grade variation to be used on sound control too.

Is one better than the other when given the choice? (between a barrier close to a highway or having a grade change between the house and highway)

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  Michael Ermann March 23, 2023 20:04

  Lila, barrier close to the source (or close to the receiver) is best….it doesn’t matter if the barrier is a wall or earth berm, as long as it is taller than the direct line of sight between source and receiver…taller still is better still, but outdoor barriers of any kind don’t work as well as most people think that they will.

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  Lila Guizado March 26, 2023 18:51

  Thank you, Michael. Very helpful.

  For anyone else looking at this. Architectural Acoustics, pages 253-254 does a better job of explaining this than the site planning book.

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  Farnaz Mehrayin September 20, 2023 12:34

  Lila, Would you be willing  to share those pages of the AA book?

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