ISO 11553-3:2013

Overview

ISO 11553-3:2013, titled Safety of machinery - Laser processing machines - Part 3: Noise reduction and noise measurement methods for laser processing machines and hand-held processing devices and associated auxiliary equipment (accuracy grade 2), provides essential requirements and methodologies to address noise hazards generated by laser processing machinery. Developed by ISO in collaboration with IEC, this international standard focuses on determining, declaring, and verifying airborne noise emissions within laser processing equipment and devices as outlined in ISO/IEC 11553-1 and 11553-2.

The standard aims to reduce health risks such as hearing loss and stress caused by noise exposure, specifying safety requirements, measurement methods, and noise reduction techniques with an engineering accuracy grade 2. It ensures comparability and reproducibility in noise emission declarations, contributing to safer workplaces and optimized machinery design.

Key Topics

• Noise Hazards from Laser Machines: Explains risks including permanent hearing loss, tinnitus, fatigue, headaches, impaired balance, disrupted communication, and failure to detect warning signals.

• Noise Reduction Requirements: Emphasizes noise mitigation as an integral part of the machinery design process by targeting noise sources using low-noise components, vibration damping, acoustic enclosures, and strategic placement of noisy parts.

• Measurement Methods: Details step-by-step procedures for noise emission measurement including sound pressure levels at workstations and sound power levels using ISO 3744, ISO 11201, and related acoustic standards under accuracy grade 2 conditions.

• Verification Procedures: Describes threshold criteria for noise testing, such as conducting initial screening with class 2 sound level meters and applying comprehensive testing if emission sound pressure exceeds defined values (e.g., 65 dB(A) at workstations).

• User Information: Specifies the required noise emission information manufacturers must provide, including emission sound pressure levels, peak instantaneous sound values, sound power levels, and recommendations for noise control measures and hearing protection.

Applications

ISO 11553-3:2013 applies broadly to:

• Industrial Laser Processing Machines: Those used for cutting, welding, marking, and engraving in manufacturing environments.

• Hand-Held Laser Processing Devices: Portable laser tools for tasks requiring mobility, where noise emission varies due to component separation.

• Auxiliary Equipment: Associated devices such as pumps, fans, and cooling systems that contribute to the overall noise signature.

This standard helps manufacturers design quieter laser processing equipment, supports safety officers in risk assessment, and aids regulatory compliance with occupational health directives. By following ISO 11553-3, companies can minimize noise exposure, enhance worker safety, and improve operational efficiency.

Related Standards

ISO 11553-3 is part of a broader set of safety standards for laser machinery, including:

• ISO/IEC 11553-1: General safety requirements for laser processing machines.
• ISO/IEC 11553-2: Safety requirements for hand-held laser processing devices.
• ISO 12100: General principles for machinery design concerning risk assessment and reduction.
• ISO 3744 / ISO 3746: Procedures for determining sound power levels of noise sources.
• ISO 11201 / ISO 11202 / ISO 11204: Methods for airborne noise emission measurements at workplaces.
• IEC 61672-1: Specifications for sound level meters used in noise measurement.
• EN 352-1: Requirements for ear-muffs as personal hearing protectors.

Together, these standards establish a cohesive framework for addressing laser machine safety, focusing on noise reduction and hazard prevention for operators and surrounding personnel.

Keywords: ISO 11553-3, noise reduction, laser processing machines, noise measurement methods, hand-held laser devices, safety standards, airborne noise emission, industrial laser safety, acoustic measurement, occupational noise hazards, laser machine noise control.