BS EN ISO 11691:2020 - Acoustics Measurement of Insertion Loss of Ducted Silencers

Discover the essential standard for acoustics professionals and engineers: BS EN ISO 11691:2020. This comprehensive document provides a detailed methodology for measuring the insertion loss of ducted silencers without flow, using a laboratory survey method. Released on December 2, 2020, this standard is a crucial resource for ensuring accurate and reliable acoustic measurements in various applications.

Key Features

• Standard Number: BS EN ISO 11691:2020
• Pages: 18
• Release Date: December 2, 2020
• ISBN: 978 0 539 02095 3
• Status: Standard

Comprehensive Acoustic Measurement

The BS EN ISO 11691:2020 standard is meticulously designed to guide professionals in the field of acoustics through the process of measuring the insertion loss of ducted silencers. This measurement is critical for assessing the performance of silencers in reducing noise levels in various environments. By following the laboratory survey method outlined in this standard, users can achieve precise and consistent results, ensuring that silencers meet the required specifications and performance criteria.

Why Choose BS EN ISO 11691:2020?

Acoustic measurement is a complex field that requires precision and accuracy. The BS EN ISO 11691:2020 standard provides a robust framework for conducting these measurements, offering several advantages:

• Reliability: The standard ensures that measurements are conducted in a controlled laboratory environment, minimizing variables and enhancing the reliability of results.
• Consistency: By adhering to a standardized method, professionals can achieve consistent results across different tests and applications.
• Compliance: This standard helps organizations comply with industry regulations and standards, ensuring that their products meet the necessary acoustic performance criteria.
• Expert Guidance: Developed by leading experts in the field, the standard provides authoritative guidance on best practices for acoustic measurement.

Applications

The BS EN ISO 11691:2020 standard is applicable in a wide range of industries and settings where noise control is a priority. Some of the key applications include:

• HVAC Systems: Ensuring that ducted silencers in heating, ventilation, and air conditioning systems effectively reduce noise levels.
• Industrial Environments: Measuring the performance of silencers in factories and other industrial settings to maintain a safe and comfortable working environment.
• Building Acoustics: Assessing the effectiveness of silencers in commercial and residential buildings to enhance occupant comfort.
• Transportation: Evaluating the noise reduction capabilities of silencers in vehicles and transportation infrastructure.

Structure and Content

With 18 pages of detailed content, the BS EN ISO 11691:2020 standard is structured to provide clear and concise guidance on the measurement process. It includes:

• Introduction: An overview of the importance of measuring insertion loss and the scope of the standard.
• Methodology: Step-by-step instructions for conducting measurements, including equipment setup and data analysis.
• Technical Specifications: Detailed technical requirements and specifications for the measurement process.
• Annexes: Additional information and resources to support the implementation of the standard.

Stay Ahead with the Latest Standards

In the rapidly evolving field of acoustics, staying up-to-date with the latest standards is essential for maintaining competitive advantage and ensuring the highest quality of work. The BS EN ISO 11691:2020 standard represents the latest advancements in acoustic measurement techniques, providing users with the tools they need to excel in their field.

Conclusion

Whether you are an acoustics engineer, a product developer, or a quality assurance professional, the BS EN ISO 11691:2020 standard is an invaluable resource for achieving accurate and reliable acoustic measurements. By incorporating this standard into your work, you can ensure that your products and systems meet the highest standards of noise control and performance.

Invest in the BS EN ISO 11691:2020 standard today and take the first step towards superior acoustic measurement and noise control solutions.

BS EN ISO 11691:2020

This standard BS EN ISO 11691:2020 Acoustics. Measurement of insertion loss of ducted silencers without flow. Laboratory survey method is classified in these ICS categories:

• 91.120.20 Acoustics in building. Sound insulation
• 91.140.30 Ventilation and air-conditioning systems
• 17.140.20 Noise emitted by machines and equipment

This document specifies a laboratory substitution method to determine the insertion loss without flow of ducted, mainly absorbent, circular and rectangular silencers, as well as other duct elements for use in ventilating and air-conditioning systems.

This document is applicable to silencers where the design velocity does not exceed 15 m/s. As the method does not include self-generated flow noise, this document is not suitable for tests on silencers where this type of noise is of great importance for the evaluation of the silencer performance. As most silencers, particularly in offices and dwelling, have design velocities below 15 m/s, this document can often be a cost-efficient alternative to ISO 7235^{[ 5]}.

The insertion loss determined according to this document in a laboratory is not necessarily the same as the insertion loss obtained in an installation in the field. Different sound and flow fields in the duct yield different results. In this document, the sound field is dominated by plane wave modes. Due to the use of regular test ducts, the results can include some flanking transmission via structural vibrations in the duct walls that sets an upper limit to the insertion loss that can be determined.

This document is intended to be used for circular silencers with diameters of 80 mm to 2 000 mm or for rectangular silencers with cross-sectional areas within the same range.