Abstract: A partition panel improves sound insulation performance and optimizes a reverberation time. The partition panel has sound absorption and insulation functions, and has a front plate having a perforated section with a plurality of through-holes and an entirely-continuous peripheral edge portion located outside the perforated section. An entirely-continuous back plate is disposed on a side opposite to a sound source across the front plate. An inner perforated plate is disposed between the perforated section of the front plate and the back plate. A front-side honeycomb core is interposed between the perforated section and the inner perforated plate, a back-side honeycomb core is interposed between the back plate and the inner perforated plate and a peripheral honeycomb core is interposed between the peripheral edge portion of the front plate and a region of the back plate opposed to the peripheral edge portion.

Abstract: Disclosed is a partition panel capable of improving sound insulation performance and optimizing a reverberation time. The partition panel has sound absorption and insulation functions, comprising: a front plate having a perforated section with a plurality of through-holes and an entirely-continuous peripheral edge portion located outside the perforated section; an entirely-continuous back plate disposed on a side opposite to a sound source across the front plate; an inner perforated plate disposed between the perforated section of the front plate and the back plate; a front-side honeycomb core interposed between the perforated section and the inner perforated plate; a back-side honeycomb core interposed between the back plate and the inner perforated plate; and a peripheral honeycomb core interposed between the peripheral edge portion of the front plate and a region of the back plate opposed to the peripheral edge portion.