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The Old 1% - 90% Rule

Posted by Dodgeman on January 30th, 2001 01:50 PM
In reply to Soundproof Fencing? by Candy Forbes on January 30th, 2001 11:28 AM [Go to top of thread]

There is an old saying among noise/vibration engineers - that is, a 1% opening will let through 90% of the sound (noise). Since you are outside, and your fence cannot be infinitely high, sound will always get through.
Having said that, you could do the following. 1) Locate a solid fence (no openings and prefered concrete or stone) as close to the source of the noise as possible. 2) Make the fence as high as your pocketbook and codes will allow. (8 foot minimum) 3) Cover the noise side of the fence with a sound absorbing material (shrubs, vines, etc.) 4) Have the front (noise side) of the fence tipped approximately 10 degrees back towards your property. The purpose of this is to force any reflected noise upward to prevent it from being re-reflected off of buildings across the street back again towards your property. If there is nothing but open space across the road from your property, your could skip this part.
Nothing you do will totally eliminate the noise. If the noise is inside your house, them you might consider modifications to the house.
Good luck,

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