1.1本试验方法计算拟用于家用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位置的动力装置。要测试用户位置中央真空的声功率级，请参阅测试方法F 1334。 1.2在半混响室内安装的中央真空动力装置上进行A加权声压测量。本试验方法通过比较小噪声源的方法确定声功率，即与宽带参考声源进行比较。 1.3本试验方法描述了确定小噪声源a加权声功率级的程序。本试验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1 pW）。 1.5以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 当在本试验方法的条件下进行试验时，试验结果可以比较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 users location, refer to Test Method F 1334. 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. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 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.