IEC 60704-2-9:20 24作为IEC 60704-2-9:20 24 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 60704-2-9:20 24适用于家用和类似用途的电动手持吹风机，由电源供电，通过气流运行。这些特定的要求也可以应用于类似的电动操作装置，例如通过风扇产生气流的美发器具。头盔式吹风机不包括在本文件中。本文件不适用于辐射加热的护发器具。要确定和验证产品质量标准中声明的噪声发射值，请参见IEC 60704-3。这第二版取消并取代了2003年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: a)符合IEC 60704-1:20 21。 本第2-9部分旨在与第四版IEC 60704-1:20 21:家用和类似用途电器-空气传播声噪声测定的试验规范-第1部分:一般要求结合使用。

IEC 60704-2-9:2024 is available as IEC 60704-2-9:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60704-2-9:2024 applies to electric hand-held hairdryers for household and similar use supplied from mains, which operate with a flow of air. These particular requirements can also be applied to analogous electrically operated devices such as hairstyling appliances, which produce the airflow by a fan. Helmet-type hairdryers are excluded from this document. This document does not apply to hair care appliances with radiant heating. For determining and verifying noise emission values declared in product specifications, see IEC 60704-3. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Alignment with IEC 60704-1:2021.
This part 2-9 is intended to be used in conjunction with the fourth edition of IEC 60704-1:2021: Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.