1.1 本试验方法计算了用于家庭应用的中央真空动力装置发出的总A加权声功率级。本标准仅适用于动力装置所在位置的动力装置。要测试用户所在位置的中央真空的声功率级，请参阅测试方法 F1334 . 1.2 A计权声压测量是在半混响室中安装的中央真空动力装置上进行的。该测试方法通过比较小噪声源的方法来确定声功率，即与宽带参考声源进行比较。 1.3 本测试方法描述了一种确定小噪声源a加权声功率级的程序。该测试方法使用非特殊的半混响室。 1.4 结果表示为A加权声功率级，单位为分贝（参考1pW）。 1.5 以英寸-磅单位表示的值应被视为标准值。括号中的值仅供参考。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 测试结果能够比较在本测试方法条件下测试时中央真空动力装置的A加权声发射。

1.1 This test method calculates the overall A-weighted sound power level emitted by central vacuum power units, intended for operation in domestic applications. This standard applies to the power unit only at the power unit location. To test the sound power level of a central vacuum at the user’s location, refer to Test Method F1334 . 1.2 A-weighted sound pressure measurements are performed on a mounted central vacuum power unit in a semi-reverberant room. This test method determines sound power by a comparison method for small noise sources, that is, comparison to a broad band reference sound source. 1.3 This test method describes a procedure for determining the A-weighted sound power level of small noise sources. This test method uses a non-special semi-reverberant room. 1.4 Results are expressed as A-weighted sound power level in decibels (referenced to 1 pW). 1.5 The values stated in inch pound units are to be regarded as the standard. The values in parentheses are for information only. 1.6 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. 1.7 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 ====== 4.1 The test results enable the comparison of A-weighted sound emission from central vacuum power units when tested under the condition of this test method.