| 摘要 |
A soundproof wall has a main wall, a first branch wall extending in a substantially vertical direction from a top of the main wall, a second branch wall extending obliquely from the main wall in a direction away from a noise source, and a third branch wall extending obliquely from an intermediate portion of the second branch wall in a direction toward the noise source. Another embodiment of the invention includes a horizontal branch extending from the main wall in a direction away from the noise source and supporting the second branch wall.
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