IEC 60704-2-8:2020 pdf free.Household and similar electrical appliances -Test code for the determination of airborne acoustical noise – Particular requirements for electric shavers, hair clippers or trimmers.
This clause of lEC 60704-1:2010 is applicable except as follows:
ISO 3743-1:2010，Acoustics – Determination of sound power levels and sound energy levelsof noise sources using sound pressure – Engineering methods for small movable sources inreverberant fields – Part 1: Comparison method for a hard-walled test room.
ISO 3743-2:2018，Acoustics – Determination of sound power levels of noise sources usingsound pressure -Engineering methods for small, movable sources in reverberant fields – Part2: methods for special reverberation test rooms.
ISO 3744:2010，Acoustics – Determination of sound power levels and sound energy levels ofnoise sources using sound pressure – Engineering methods for an essentially free field over areflecting plane.
This clause of IEC 60704-1:2010 is applicable except as follows:Addition:
Iso and lEC maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp
mains powered shaver,hair clipper or trimmer that can be operated directly from the mains supply.
rechargeable shaver, hair clipper or trimmer that is supplied by a secondary battery belonging to it.
battery powered shaver, hair clipper or trimmer that is supplied by primary batteries.
trimmer accessory accessory incorporated in the shaver to groom particular facial hair,for example, moustache,beard or side whiskers.
Shavers，hair clippers or trimmers can produce pure tones. lf pure tone components arepresent in the noise emitted by the source, the estimated standard deviation of the measuredsound pressure levels in the special reverberation room can increase. In such cases,additional microphone positions or source positions can be necessary, as specified inlSo 3743-2.
lf pure tone components are present in the noise emitted by the source，the estimatedstandard deviation of the measured sound pressure levels in the hard-walled test room or inthe special reverberation room can increase. In such cases,additional microphone positionsor source positions can be necessary, as specified in ISO 3743-1 or ISO 3743-2.
Shavers，hair clippers or trimmers shall be equipped as for ordinary shaving,clipping ortrimming. Shavers, hair clippers or trimmers with a cutting selector shall be adjusted in such away that the cutting head is in the least visible position that the construction allows.
The shaver, hair clipper or trimmer shall be clean，including the hair chamber,if any. Theappliance shall be oiled with a light oil having a viscosity not exceeding 20 cSt at 50 °C. If themanufacturer prescribes a different method of cleaning or lubrication，the manufacturer’smethod should be followed.IEC 60704-2-8 pdf download.