声学对称特性消声器传声损失测量方法  

The Measurement Method and Validation of Transmission Loss in the Acoustic Symmetrical Characteristic Muffler

作　　者：褚志刚[1] 蔡鹏飞[1] 周亚男[1] 张晋源[1,2] 杨洋[2] 

机构地区：[1]重庆大学机械工程学院,重庆400044 [2]重庆工业职业技术学院车辆工程学院,重庆401120

出　　处：《机械科学与技术》2013年第10期1433-1436,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：为了实现对具有声学对称特性的消声器传声损失的快速测量,结合其声传递矩阵内部各元素之间的数学关系,提出了一种能够消除消声器下游透射反射波对上游声场耦合的四传声器单载传声损失测量的新方法。以赫姆霍兹共振式消声器为例,基于边界元法对其传声损失进行虚拟测量,虚拟实验结果与理论结果吻合良好,验证了其正确性。该方法通过一次测量即可获得传声损失,具有测量设备简单、速度快、精度高、更易于使用等诸多优点。In order to measure the transmission loss （TL） of muffler in the acoustic symmetrical characteristic rap- idly, a new method utilizing four microphones and one-load was put forward. The couple of downstream transmis- sion reflection wave to the upstream sound field could be eliminated with the reference of mathematical relationship of acoustic transfer matrix. By using the boundary element method, the TL virtual measurement of a Helmholtz res- onant muffler was performed and the new method was validated： Comparing with the traditional methods, the TL could be acquired by one measurement and the advantages such as the simple measuring equipments, fast speed, high precision, easy operation, etc were achieved.

关 键 词：消声器 传声损失 测量 传递矩阵 声学对称特性 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程] U464[机械工程—车辆工程]