Overview
SIST EN ISO 11688-2:2001 sets out the fundamental principles and recommended practices for the design of low-noise machinery and equipment, focusing especially on the physics underlying low-noise design. As a European adoption of ISO/TR 11688-2:1998, this standard provides essential guidance to designers, engineers, equipment users, and regulatory authorities. Its central goal is to enable noise reduction at the source-during the planning and design phase-to facilitate quieter machines and workplaces, improve user comfort, and assist in meeting legal requirements for occupational and environmental noise.
Key Topics
SIST EN ISO 11688-2:2001 addresses several core aspects of acoustics in machinery design:
- Acoustical Modelling: Explains the creation of models to better understand complex sound generation and propagation mechanisms within machines. Differentiates among internal sources, transmission paths (airborne, liquid-borne, structure-borne), and radiation.
- Noise Generation: Describes the physics behind various noise sources, including fluid-dynamic and structure-borne noise, and classifies noise-producing mechanisms such as turbulence, cavitation, and mechanical impacts.
- Noise Control Measures: Details practical methods for controlling both airborne and structure-borne sound, including reducing flow velocities, optimizing machine components, and implementing damping.
- Sound Propagation and Transmission: Outlines how noise travels through machine structures and air, considering both internal and external pathways.
- Analysis Techniques: Presents measurement and computational methods to analyze noise emissions, aiding effective design modifications and the assessment of existing equipment.
These topics offer a foundational understanding for professionals concerned with machine noise and its mitigation.
Applications
Implementing the practices and principles from SIST EN ISO 11688-2:2001 delivers significant practical value across industries:
- Machinery and Equipment Design: Provides engineers and designers with knowledge to mitigate potential noise issues from the earliest conceptual stages, setting the groundwork for compliance and comfortable use.
- Occupational Health and Safety: Supports actions to reduce workplace noise, helping organizations adhere to noise exposure limits and safeguarding worker health.
- Product Development: Enables manufacturers to create quieter products, increasing market competitiveness and customer satisfaction.
- Regulation Compliance: Assists organizations and authorities in assessing machine noise for conformity with legislative requirements regarding noise emission and control.
- Noise Diagnostics and Retrofits: Offers guidance for evaluating and improving the acoustic properties of existing machines through measurement and computational analysis, ensuring continuous improvement and adaptation.
Whether used for new designs or existing installations, this standard offers a systematic approach to identify, analyze, and control noise sources.
Related Standards
For a comprehensive approach to noise control in machinery, refer to these related standards:
- EN ISO 11688-1: Planning for the design of low-noise machinery and equipment, providing a complementary framework for practical implementation.
- ISO 3740 series: On the determination of sound power levels of noise sources using sound pressure.
- ISO 11200 series: Procedures for the determination of emission sound pressure levels at a work station and at other specified positions.
- ISO 9614 series: Determination of sound power levels of noise sources using sound intensity.
Together with SIST EN ISO 11688-2:2001, these standards form a robust reference base for achieving low-noise machinery design, promoting best practices, and ensuring noise emission compliance across the industry.
Keywords: SIST EN ISO 11688-2:2001, low-noise machinery, noise control, acoustics, machine noise, sound emission, equipment design, measurement methods, structure-borne noise, airborne noise, industrial noise standards, noise mitigation.