General requirements for earmuffs attached to an industrial safety helmet.
EN 352-3:2002, this part of the standard specifies requirements for construction, design, performance, marking, and user information for ear-muffs fitted to an industrial helmet which complies with EN 397.
EN 352-3:2002 - HEARING PROTECTIN - GENERAL REQUIREMENTS - PART 3: EAR-MUFFS ATTACHED TO AN INDUSTRIAL SAFETY HELMET
It specifies the sound attenuation of the helmet-mounted earmuffs, measured in accordance with EN 24869-1. Because one model of earmuffs designed to be attached to an industrial safety helmet can be fitted to a number of helmet models and sizes, this part of the standard sets out a series of physical and acoustic requirements for the earmuffs when fitted to the specified model(s) or size(s) of a helmet. All requirements apply to the earmuffs fitted to one of the specified models or sizes of helmet (the basic combination), and an abbreviated set of requirements apply to the same model of earmuffs when fitted to the other specified models or sizes of helmet (the supplementary combinations). Information on the range of models of helmets tested with the earmuffs, and for which the combination satisfied this standard, is required to be made available. Ergonomic aspects are addressed by taking into account the requirements: the interaction between the wearer, the device, and whenever possible, the working environment in which the device is likely to be used.
Marking earmuffs:
• Manufacturer/company name
• Identification or model number
• Number and date of the standard
• When required- e.g., “Top “and/or “Left “and “Right”
