IEC 60318-4:20 10描述了一种用于测量频率范围从100Hz到10000 Hz的插入式耳机的闭塞耳模拟器。它适用于空气传导助听器和耳机，通过耳塞例如耳模或类似装置耦合到耳朵。闭塞耳模拟器也适合作为旨在模拟完整耳道和外耳的扩展的基础（例如在头部模拟器中）。闭塞耳模拟器模拟闭塞的正常成人人耳的声传递阻抗。然而，它没有模拟耳模和人耳道之间的泄漏；因此，用闭塞耳模拟器获得的结果可能偏离真实耳朵上的插入式耳机的性能，特别是在低频下。此外，在使用耳朵模拟器时，应考虑各个耳朵之间的较大性能差异。在10 kHz以上，该设备不模拟人耳，但可以在高达16 kHz的附加频率下用作声学耦合器。在100 Hz以下，该设备尚未经过验证可以模拟人耳，但可以在低至20 Hz的附加频率下用作声学耦合器。 IEC 60318-4:20 10取消并取代1981年发布的IEC 60711，构成技术修订。与上一版相比的主要变化如下: -将可用频率范围扩展到100Hz-16000Hz； -将最大允许扩展不确定度值添加到所有公差中。

IEC 60318-4:2010 describes an occluded-ear simulator intended for the measurement of insert earphones in the frequency range from 100 Hz to 10 000 Hz. It is suitable for air conduction hearing aids and earphones, coupled to the ear by means of ear inserts e.g. ear moulds or similar devices. The occluded-ear simulator is also suitable as the basis for an extension intended to simulate the complete ear canal and the outer ear (for instance in head simulators). The occluded-ear simulator simulates the acoustic transfer impedance for the occluded normal adult human ear. However, it does not simulate the leakage between an earmould and a human ear canal; therefore, the results obtained with the occluded-ear simulator may deviate from the performance of an insert earphone on a real ear, especially at low frequencies. Moreover, large performance variations among individual ears will occur which should be considered when using the ear simulator. Above 10 kHz the device does not simulate a human ear, but can be used as an acoustic coupler at additional frequencies up to 16 kHz. Below 100 Hz, the device has not been verified to simulate a human ear, but can be used as an acoustic coupler at additional frequencies down to 20 Hz. IEC 60318-4:2010 cancels and replaces IEC 60711, published in 1981 and constitutes a technical revision. The main changes with respect to the previous edition are listed below:
- extension of the usable frequency range to 100 Hz - 16 000 Hz;
- addition of values of maximum permitted expanded uncertainties to all tolerances.