关键词: 声学, 传声损失, 层合板, 正交异性, 传递矩阵

Abstract: In the case of high frequency sound waves incident, sound transmission loss formula of orthotropic composite laminates was introduced on basis of transfer matrix method. Audio calculated model was established by composite laminates plate, transmission loss was analyzed by researching the laminate lay angle, plate thickness and density of structural parameters of the laminated plate. The results showed that, effected by fabric and basic performance, laying method, laying angle and other factors, Mass Law can not reflect correctly the sound insulation feature of laminated composite plate. Comparison and analysis can show that there is no obvious linearity between composite material density and sound transmission loss; the greater thickness of laminated plate, the greater of sound transmission loss, also, the thickness of each layer is different, which also can cause the change of sound transmission loss; the greater of angel of laminated plate, the greater of sound transmission loss.