1.1 本试验方法计算小型便携式立式、筒式、组合式真空吸尘器、背包式吸尘器、硬地板清洁机、提取器和中央真空吸尘器电动喷嘴发出的总A加权声功率水平，这些喷嘴用于家庭和商业应用。 1.1.1 要确定动力装置位置的中央真空的声功率级，请参阅测试方法 F2544 . 1.2 A加权声压测量是在半混响室中的固定式真空吸尘器、提取器、硬地板清洁机或背包式吸尘器上进行的。该测试方法通过小噪声源的比较方法确定声功率，即与宽带参考声源的比较。 1.3 本试验方法描述了确定小噪声源的近似a加权声功率水平的程序。 此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1皮瓦）。 1.5 以英寸磅为单位的数值应视为标准。括号中的值仅供参考。 注1: F11.21小组委员会正在地毯行业的协助下，积极寻求与新市场相关的地毯。尽管毛绒和Freize地毯面板不再可供购买，但一些实验室可能仍有样品可供测试。在这种情况下，表值仍然有效。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.7 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 当在该测试方法的条件下进行测试时，测试结果能够比较真空吸尘器、背包式真空吸尘器，提取器或硬地板清洁机的A加权声音发射。

1.1 This test method calculates the overall A-weighted sound power level emitted by small portable upright, canister, combination vacuum cleaners, backpack vacuum cleaners, hard-floor cleaning machines, extractors, and central vacuum cleaner motorized nozzles intended for operation in domestic and commercial applications. 1.1.1 To determine the Sound Power Level of a central vacuum at the power unit location refer to Test Method F2544 . 1.2 A-weighted sound pressure measurements are performed on a stationary vacuum cleaner, extractor, hard-floor cleaning machine, or backpack vacuum cleaner in a semi-reverberant room. This test method determines sound power by a comparison method for small noise sources, that is, comparison to a broadband reference sound source. 1.3 This test method describes a procedure for determining the approximate 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 one picowatt). 1.5 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only. Note 1: The F11.21 subcommittee is actively pursuing new market relevant carpets with the assistance of the carpet industry. Although plush and Freize carpet panels are no longer available for purchase, some laboratories may still have samples for testing. In such cases, the table values remain valid. 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 vacuum cleaners, backpack vacuum cleaners, extractors, or hard-floor cleaning machines when tested under the condition of this test method.