1.1 根据试验方法，在实验室测量门的隔声性能，作为声音传输损失 E90 . 使用这些数据，分配了单编号额定声音传输等级（STC）。在现场，包含门的隔墙一侧或两侧的房间通常太小或太大，且具有吸收性，无法测量隔墙门组件的表观传输损耗（ATL）。即使不是这样，测量的结果也是包括门在内的隔板的复合ATL，而不是门本身的复合ATL。试验方法 E336页 声明不可能根据该标准的程序测量隔板（如门）部分的ATL。 本试验方法提供了一种使用归一化插入损耗以及由此产生的单编号额定门传输等级DTC在现场评估门的方法。该方法主要用于带闭锁机构的铰链式人员门，且仅限于面积小于6 m的门开口 2. . 与试验方法相比，周围结构的侧翼效应减小 E336页 但并没有完全消除。在实验室环境中，DTC接近或等于门的STC，但由于侧翼，现场结果低于实验室STC。 1.2 以国际单位制表示的数值应视为标准值。 本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本标准提供了一种在Morin最初提出的领域内测试车门表面隔音性能的方法 ( 1. ) . 6. 这允许使用与传输损耗类似的结果评估车门。 5.2 该测量结果是各个频率下的归一化车门插入损耗NDIL和单编号额定车门传输等级DTC。当门打开和关闭时，声源侧发生的声级微小变化使插入损耗正常化。当通过门在每个方向上测量时，结果在理论上是相同的，但在实践中观察到了差异。 5.3 使用该方法和试验方法的比较测量 E90 在实验室的相同门装置上，当门位于两个房间之间的墙上且侧翼不显著时，表明传输损耗和标准化门插入损耗之间的良好一致性。没有对走廊进行类似的验证。看见 附录X1 和Ref ( 2. ) . 5.4 现场比较了固定传声器和扫描方法。看见 附录X2 .

1.1 The sound insulation properties of a door are measured in a laboratory as the sound transmission loss in accordance with Test Method E90 . Using those data, the single-number rating sound transmission class (STC) is assigned. In the field, the rooms on one or both sides of a partition containing a door are often either too small or too large and absorptive to allow the apparent transmission loss (ATL) of the partition-door assembly to be measured. Even if that is not the case, the result measured is the composite ATL of the partition including the door, and not that of the door itself. Test Method E336 states that it is impossible to measure the ATL of a portion of a partition such as a door according to the procedures of that standard. This test method provides a method of evaluating doors in the field using a normalized insertion loss with a resulting single-number rating door transmission class, DTC. This method is intended primarily for hinged personnel doors with latching mechanisms and is limited to door openings of area less than 6 m 2 . The flanking effects of surrounding structure are reduced compared to Test Method E336 but not completely eliminated. In a laboratory environment, the DTC is close to or equal to the STC of the door, but in the field results less than the laboratory STC are to be expected due to flanking. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This standard provides a method for testing the apparent sound insulating properties of doors in the field originally proposed by Morin ( 1 ) . 6 This allows doors to be evaluated with a result that has been found to be similar to the transmission loss. 5.2 The results of this measurement are the normalized door insertion loss, NDIL, at individual frequencies, and the single-number rating door transmission class, DTC. The insertion loss is normalized by the small change in sound level which occurs on the source side when the door is opened and closed. The results are in theory the same when measured in each direction through the door, but differences have been observed in practice. 5.3 Comparative measurements using this method and the method of Test Method E90 on the same door installations in a laboratory indicate good agreement between the transmission loss and normalized door insertion loss when the door is in a wall between two rooms and flanking is not significant. No similar verification has been done for corridors. See Appendix X1 and Ref ( 2 ) . 5.4 The fixed-microphone and scanning methods have been compared in the field. See Appendix X2 .