The influence of the frames and stringers on the bending rigidity of the aircraft sidewall skin has been taken into account in computation of sound transmission coefficient and the stiffness term in sound transmission loss has been revised. 在透射系数的计算中,考虑了飞行隔框、长桁对蒙皮刚度的影响,从而对透射系数中的刚度项进行了修正。
Based on the acoustical properties of wall corner junction, theory analysis is employed to model sound transmission through junction, and then the transmission coefficient between two walls of junction has been calculated. 对建筑中墙角节点的声传递进行了理论分析,计算了其声透射系数(STC)和隔声量。
An account is given for the method of calculation of sound transmission gains and the difference between the peak and average levels in the transmission response in terms of the acoustic feedback coefficient. 本文给出传声增益的计算方法,并用声反馈系数的测量来决定传输响应中最大峯级和平均级之间的差值。
In this paper, the sound absorption of underwater multi-layered composite structure influenced by material performance and geometrical parameters is discussed using transmission matrix. Theoretical formula of absorption coefficient is given and emulation calculation is developed. 采用传递矩阵方法研究了材料特性、几何参数对水下多层均匀复合结构声学性能的影响,给出了吸声系数的理论公式并开展了计算仿真。