GB/T 4854.1-2004 in English

《GB/T 4854.1-2004声学 校准测听设备的基准零级 第1部分:压耳式耳机纯音基准等效阈声压级》由TC17（全国声学标准化技术委员会）归口，主管部门为中国科学院。
GB/T 4854的本部分规定了纯音气导听力计听阀级分度的基准零级。本部分阐述的资料，即在符合GB/T 7342规定的耦合腔中测量的两种不同型号标准耳机的响应，以及在符合GB/T 7614规定的仿真耳上测量的(4.3中规定的)其他型号压耳式耳机的响应，可直接用于听力计样准。本标准是以来自多个负责测听标准化的实验室和科学出版物的资料作出的估算为基础的。本部分所推荐的基准级的导出和应用，见附录A。

Scope

This part of GB/T 4854 specifies the reference zero level of the pure tone air conduction audiometer hearing threshold scale. The information described in this part is the response of two different types of standard earphones measured in a coupling chamber that complies with GB/T 7342, and the other (specified in 4.3) measured on an artificial ear that complies with GB/T 7614. The response of the model on-ear headphones can be used directly for audiometer calibration. This standard is based on estimates from various laboratories and scientific publications responsible for the standardization of audiometry. See Appendix A for the derivation and application of the benchmark levels recommended in this section.