| 摘要 |
To overcome acoustic distortion caused by local resonance in panel core cells, a resonant multi-mode radiator element is provided for a panel form loudspeaker with a functional upper frequency limit ƒmax. The element has skins and a cellular based core, the skins have a thickness h, a Young's modulus &Egr; a Poisson's ratio of &ngr; and a material density rho and the core has a cell size lcell characterized in that the cell size lcell is less than equation (2). |
