| 摘要 |
PROBLEM TO BE SOLVED: To provide an incombustible sound absorption panel favourable for a sound absorber of a household unit, an electrical appliance, a railway, a building and the like, which has high acoustic absorptivity in a middle frequency region of around 500 Hz to the vicinity of 1000 Hz, and has a thinner thickness.SOLUTION: The incombustible sound absorption panel at least comprises: a honeycomb core material 11 containing an incombustible component; a frame member 21 surrounding a circumference of the honeycomb core material 11; and air-impermeable face materials 31 and 41 arranged on both opened faces of the honeycomb core material 11. The air-impermeable face material 31 on a sound absorption side is composed of a surface layer including a face material of aluminium or aluminium alloy and resin, and the air-impermeable face materials 31 and 41 on both faces of the honeycomb core material 11 are fixed to the frame member 21. The air-impermeable face material 31 on a sound absorption side at least has a portion not fixed to the honeycomb core material 11. |
