BS EN ISO 6926:2016+A1:2020 Acoustics Standard

Discover the essential standard for acoustics professionals and engineers: BS EN ISO 6926:2016+A1:2020. This comprehensive document outlines the requirements for the performance and calibration of reference sound sources used in the determination of sound power levels. Whether you are involved in product development, quality assurance, or compliance testing, this standard is a critical resource for ensuring accuracy and consistency in acoustic measurements.

Key Features

• Standard Number: BS EN ISO 6926:2016+A1:2020
• Pages: 30
• Release Date: December 11, 2020
• ISBN: 978 0 539 06206 9
• Status: Standard

Comprehensive Coverage

This standard provides detailed guidelines on the performance and calibration of reference sound sources. It is designed to help professionals achieve precise and reliable sound power level measurements, which are crucial for a wide range of applications, from environmental noise assessments to product noise labeling.

Performance Requirements

The document specifies the performance criteria that reference sound sources must meet to ensure they provide accurate and repeatable results. This includes parameters such as frequency range, sound pressure levels, and directivity characteristics. By adhering to these requirements, users can be confident in the validity of their acoustic measurements.

Calibration Procedures

Calibration is a vital aspect of maintaining the accuracy of reference sound sources. The standard outlines the procedures for calibrating these sources, ensuring they remain within specified tolerances. This section of the document is particularly valuable for laboratories and testing facilities that require traceable and standardized calibration methods.

Why Choose BS EN ISO 6926:2016+A1:2020?

Adopting this standard offers numerous benefits, including:

• Consistency: Ensures uniformity in sound power level measurements across different settings and applications.
• Reliability: Provides a trusted framework for evaluating the performance of reference sound sources.
• Compliance: Helps organizations meet regulatory and industry-specific requirements for acoustic measurements.
• Quality Assurance: Supports the development of high-quality products by enabling accurate noise assessments.

Who Should Use This Standard?

This standard is indispensable for a variety of professionals, including:

• Acoustic engineers and consultants
• Product designers and manufacturers
• Quality assurance and compliance officers
• Environmental noise assessors
• Testing and calibration laboratories

Stay Ahead in Acoustics

In the ever-evolving field of acoustics, staying informed about the latest standards is crucial. BS EN ISO 6926:2016+A1:2020 represents the cutting edge of acoustic measurement standards, incorporating the latest advancements and best practices. By integrating this standard into your processes, you can enhance the accuracy and reliability of your acoustic assessments, ensuring your work meets the highest industry standards.

Conclusion

BS EN ISO 6926:2016+A1:2020 is more than just a standard; it is a comprehensive guide to achieving excellence in acoustic measurements. With its detailed requirements and calibration procedures, it is an invaluable resource for anyone involved in the field of acoustics. Ensure your sound power level determinations are precise and reliable by incorporating this essential standard into your toolkit.

BS EN ISO 6926:2016+A1:2020

This standard BS EN ISO 6926:2016+A1:2020 Acoustics. Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels is classified in these ICS categories:

• 17.140.01 Acoustic measurements and noise abatement in general

This International Standard specifies the acoustical performance requirements for reference sound sources:

• temporal steadiness (stability) of the sound power output;

• spectral characteristics;

• directivity.

Temporal steadiness is defined in terms of the standard deviation of repeatability (see 5.2). The spectral characteristics can be verified in either a hemi-anechoic room or a reverberation test room from measurements of the frequency band sound power levels in accordance with this International Standard (see 5.4). The performance requirements on directivity index can only be verified in a hemi-anechoic room (see 5.5.)

This International Standard also specifies procedures for providing level calibration data and uncertainty on a sound source intended for use as a reference sound source in terms of its sound power level under reference meteorological conditions as defined in Clause 4 in octave and in one-third-octave bands, and with frequency weighting A.

This document is titled as a calibration standard even though the method is typically conducted in a testing laboratory. While the sound pressure level measurements and distances associated with this method are traceable, the sound power level calibration results are not directly traceable to national standards of measure in a strict metrological sense. Testing laboratories performing this method are not expected to meet all requirements normally associated with a calibration laboratory.

NOTE ISO/IEC 17025^[15] specifies different requirements for the competence of testing laboratories and calibration laboratories respectively. Laboratories testing reference sound sources in accordance with this International Standard would typically comply with the requirements for testing laboratories but not necessarily with those for calibration laboratories.

This International Standard specifies methods to calibrate reference sound sources not only in a free field over a reflecting plane but also in reverberation test rooms at different distances from the boundary surfaces. For the position of the reference sound source on one reflecting plane, the two different test environments mentioned above are considered equivalent for frequency bands above or equal to 200 Hz. At 160 Hz and below, some systematic differences can occur (see 11.2). For frequencies below 100 Hz, an alternative calibration method using sound intensity is given.

The sound source can either be placed directly on the floor or mounted on a stand to be used at a certain elevation above the floor. According to this International Standard, stand-mounted sources are calibrated in reverberation test rooms. Floor-mounted sources are either calibrated in hemi-anechoic or in reverberation test rooms. For floor-mounted sources in hemi-anechoic rooms, this International Standard is valid only for sources whose maximum vertical dimension is less than 0,5 m and whose maximum horizontal dimension is less than 0,8 m. According to this International Standard, only floor-mounted reference sound sources can be used when carrying out measurements on a measurement surface. For reference sound sources to be used or calibrated under reverberant conditions, no such restrictions on maximum dimensions apply.