Indiana Noise Control Study and Recommendations
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How to fill out Noise Control Study And Recommendations?
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FAQ
For acoustical purposes, any material may be used for a barrier between a noise source and a noise receiver as long as it has a TL of at least 10 dB(A) greater than the desired noise reduction (i.e. Insertion Loss (IL) determined in the EIA or NIA studies). Guidelines on Design of Noise Barriers - Highways Department hyd.gov.hk ? doc ? barrier_leaflet hyd.gov.hk ? doc ? barrier_leaflet
What is a Noise Barrier? Noise barriers are solid obstructions built between the highway and homes or residences along a highway. Effective noise barriers typically reduce noise levels by 5 to 10 dB, which reduces the loudness of traffic noise by as much as one-half.
Traditionally, these blockades use metal, brick, concrete or wood to minimize the loud noises generated by highway traffic. These highway sound barrier walls are important to keep offensive freeway sounds from penetrating local neighborhoods and business districts. Do Highway Noise Barrier Walls Work In Reducing Noise? - Sound Walls soundwalls.com ? do-freeway-sound-walls-work soundwalls.com ? do-freeway-sound-walls-work
Noise barriers are most effective for the first one or two rows of homes at distances up to 200 feet from the barrier. As noise levels decrease with distance, there is a point away from the highway at which noise barriers are no longer effective.
Earth berms are often a preferred alternative to freestanding noise walls since they can provide comparable (or greater) noise reductions, require less maintenance, provide a natural appearance, and can typically be constructed at much lower cost than typical post-and- panel noise wall systems.
INDOT requires that noise barriers achieve a minimum 5 dB(A) reduction at a majority (greater than 50 percent) of the impacted noise receptors (those that would receive a reduction of at least 5 dB(A)).
Several different materials may be used for sound barriers. These materials can include masonry, earthwork (such as earth berm), steel, concrete, wood, plastics, insulating wool, or composites. Walls that are made of absorptive material mitigate sound differently than hard surfaces. Noise barrier - Wikipedia wikipedia.org ? wiki ? Noise_barrier wikipedia.org ? wiki ? Noise_barrier
The sheer mass of masonry walls?stone, brick, stucco-covered concrete ? make them the best for blocking sound. Next best, and more practical for most homeowners, would be any solid stockade or board fence. 3 Ways to Reduce Road Noise in Your Backyard - This Old House thisoldhouse.com ? yard-noise-reduction thisoldhouse.com ? yard-noise-reduction