The classical transfer path analysis (TPA) method has become a standard measurement method. It has high accuracy but remains a time-consuming and complex measurement, which limits its application in industry. The operational transfer path analysis (OTPA) method is known for its high efficiency; however, the accuracy of this method for industrial application is controversial. To separate the intake and exhaust noises in the vehicle, this study presents a novel TPA method called simulated operational path analysis (SOPA). The transmissibility from the reference point to the target response point is estimated by using an external noise source to simulate the intake and exhaust noises under operating condition. In addition, the improved dual-microphone noise reduction technology is used to eliminate the background noise in the reference response. The method is validated by an experimental bench. The result shows that its high accuracy can be compared with the classical TPA method. Because there is no need to use a special miniature volume source to estimate the passive subsystem frequency response functions and identify the operational source loads, the efficiency of the SOPA method is higher than the classic TPA method and is close to the OTPA method.

经典的传输路径分析（TPA）方法已成为标准的测量方法。它具有很高的精度，但仍然是一项耗时且复杂的测量，从而限制了其在工业中的应用。操作传输路径分析（OTPA）方法以其高效而著称；但是，这种方法在工业应用中的准确性是有争议的。为了分离车辆中的进气和排气噪声，本研究提出了一种新颖的TPA方法，称为模拟操作路径分析（SOPA）。通过使用外部噪声源模拟工作条件下的进气和排气噪声，可以估算从参考点到目标响应点的透射率。此外，改进的双麦克风降噪技术用于消除参考响应中的背景噪声。该方法已通过实验台验证。结果表明，它的高精度可以与传统的TPA方法相提并论。因为不需要使用特殊的微型体积源来估计无源子系统的频率响应函数并确定工作源负载，所以SOPA方法的效率高于传统的TPA方法，并且接近OTPA方法。