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<p>Interior building surfaces can be constructed of many different materials and finishes. Ideal acoustical panels are those without a face or finish material that interferes with the acoustical infill or substrate.  <a href="page.php?w=textile">Fabric</a> covered panels are one way to heighten acoustical absorption. <a href="page.php?w=Perforated_metal">Perforated metal</a> also shows sound absorbing qualities. Finish material is used to cover over the acoustical substrate. Mineral fiber board, or <a href="page.php?w=Micore">Micore</a>, is a commonly</p><p>
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