| 摘要 |
A sound dampening panel comprises a corrugated center barrier sandwiched between fibrous sound dampening material which is covered with fabric. The fibrous material fills the spaces between corrugations and forms a layer over the corrugations. In one form of panel the fibrous material is thermally fused under pressure such that it is rigidly formed with a relatively low density in the spaces between the corrugations and with a relatively high density in the layer over the corrugations. The fibrous material is also thermally bonded to the center barrier. In another form of panel, inserts of one density are placed in the spaces between corrugatins and those inserts are covered by a layer of greater density which is glued to ridges of the corrugations.
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