| 摘要 |
An acoustic absorption system fills each frame void within an airframe section with a close fitting foam portion. A mass barrier layer is adhered over the foam portions and to a multitude of frame members. The mass barrier layer is a contiguous layer adhered across the multitude of frame members to seal the airframe frame voids to make use of mass-air-mass principles to reduce flanking path leakage around the foam portions.
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