Patent ID: 8567558

Claim:
A partition panel that has both a sound absorption function for absorbing sound from a sound source and a sound insulation function for insulating the sound, the partition panel comprising: a front plate having a perforated section that is provided with a plurality of through-holes and a peripheral edge portion which is entirely continuous and located outside of the perforated section; a back plate which is entirely continuous and disposed facing a back side of the front plate, wherein a front side of the front plate is for facing the sound source; an inner perforated plate having a plurality of through-holes, the inner perforated plate being disposed between the perforated section of the front plate and the back plate, and the inner perforated plate having an opening ratio that is less than the opening ratio of the perforated section of the front plate; a front-side honeycomb core having a honeycomb structure, the front-side honeycomb core being disposed between the perforated section of the front plate and the inner perforated plate so as to contact both the perforated section and the inner perforated plate; a back-side honeycomb core having a honeycomb structure, the back-side honeycomb core being interposed between the back plate and the inner perforated plate so as to contact both the back plate and the inner perforated plate; and a peripheral honeycomb core having a honeycomb structure, the peripheral honeycomb core being interposed between the peripheral edge portion of the front plate and the back plate so as to contact both the peripheral edge portion and a region of the back plate opposite to the peripheral edge portion.