When the non-homogenous layer is divided, the sound absorption performance of the structures is increased in low frequency.
结果表明，对非均匀层进行分层后，结构在低频时的吸声性能有所提高。
When the non-homogenous layer is divided, the sound absorption performance of the structures is increased in low frequency.
结果表明，对非均匀层进行分层后，结构在低频时的吸声性能有所提高。
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