| 摘要 |
<p>A multi-layer acoustically absorptive mat includes a base layer (130) having an exposure hole (140) defined therein. A face layer (110) is disposed adjacent the base layer. An acoustic absorbing layer is interposed between the base layer and the face layer. The acoustic absorbing layer includes an exposed portion extending across the exposure hole wherein the base layer is bonded to the acoustic absorbing layer.</p> |
