Overview
The SIST EN ISO 11202:2010/A1:2021 standard focuses on acoustics related to noise emissions from machinery and equipment. It specifies methods for determining emission sound pressure levels at workstations and other specified positions. The standard introduces approximate environmental corrections to improve the accuracy of noise measurement in real operating conditions. As an amendment to ISO 11202:2010, this 2021 update incorporates refined procedures and clarifications to enhance measurement reliability and conformity within Europe, aligned with Directive 2006/42/EC concerning machinery safety.
Key Topics
- Emission Sound Pressure Levels: Defines measurement techniques for characterizing noise emission from machinery at operator and specified locations.
- Environmental Corrections: Introduces methods to apply approximate corrections accounting for environmental influences such as reflections, background noise, and room conditions.
- Workstation Positioning: Clarifies the relationship between the reference measurement surface and actual workstations, allowing flexibility in locating measurement points relative to noise sources.
- Uncertainty and Accuracy: Details updated uncertainty budgets and accuracy grades (grades 2 and 3) relevant to field measurements, including contributions to uncertainty from local environmental corrections and directivity indices.
- Measurement Surfaces: Discusses optimal measurement surfaces for both emission sound pressure and sound power levels, acknowledging they may differ depending on the application.
- Directive Compliance: Demonstrates the standard’s compliance with EU Machinery Directive 2006/42/EC essential requirements, providing presumption of conformity when applied properly.
Applications
SIST EN ISO 11202:2010/A1:2021 is essential for:
- Industrial Noise Assessment: Evaluating noise exposure at workstations to ensure compliance with occupational health regulations and reduce hearing risk.
- Machinery Design and Development: Assisting manufacturers in designing quieter equipment by providing reliable emission data.
- Regulatory Compliance: Serving as a voluntary harmonized standard to demonstrate conformity with European machinery safety requirements.
- Environmental Noise Control: Supporting noise control programs in factories, plants, and construction sites by quantifying machinery noise under operational conditions.
- Measurement and Testing Services: Providing a standardized framework for acoustic testing laboratories performing machinery noise assessments.
Related Standards
- ISO 11201: Measurement of emission noise at the operator’s position for machinery under specific operating conditions.
- ISO 11203: Guidelines for source sound emission sound power measurement in the workplace environment.
- ISO 3744 / ISO 3745: Methods for sound power determination of noise sources using engineering techniques.
- Directive 2006/42/EC: European Community machinery safety directive, where ISO 11202 acts as a harmonized standard supporting compliance.
- EN ISO 11204: Complementary standard offering methods to improve accuracy in sound power determination, referenced for improved uncertainty management.
By aligning noise measurement with approximate environmental corrections, SIST EN ISO 11202:2010/A1:2021 ensures practical and reliable acoustic assessment that supports workplace noise control, equipment noise management, and regulatory compliance efforts across industries. This makes it a vital tool for acoustic engineers, machinery manufacturers, safety professionals, and standards bodies worldwide.
