This Recommendation specifies the artificial ears for telephonometric use. Three types are recommended, covering the different transducers, types, sizes and technologies. The methods of use of the artificial ears are outside the scope of this Recommendation; however, some general rules are provided about the application force and the positioning of transducers.
ITU-T P.57-2011由国际电信联盟 IX-ITU 发布于 2011。
ITU-T P.57-2011 在中国标准分类中归属于: M70 广播、电视设备综合。
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