Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN 352-3:2002
• Năm ban hành / Publication date: 2002
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Hearing protectors General requirements Part 3: Ear-muffs attached to an industrial safety helmet
• Phạm vi áp dụng / Scope of standard: 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. In particular, it specifies the sound attenuation of the helmet mounted ear-muffs, measured in accordance with EN 24869-1