BS EN ISO 11904-2:2021 Acoustics Standard

Welcome to the comprehensive guide on the BS EN ISO 11904-2:2021 standard, a pivotal document in the field of acoustics. This standard is essential for professionals and organizations involved in the measurement and analysis of sound immission from sources placed close to the ear, utilizing advanced techniques with a manikin.

Overview

The BS EN ISO 11904-2:2021 is a meticulously crafted standard that provides a detailed methodology for determining sound immission from sound sources that are positioned near the ear. This is particularly relevant in scenarios involving headphones, earphones, and other personal audio devices. The standard employs a manikin to simulate human hearing, ensuring that the measurements are as accurate and representative as possible.

Key Features

• Standard Number: BS EN ISO 11904-2:2021
• Pages: 26
• Release Date: March 23, 2021
• ISBN: 978 0 539 14375 1
• Status: Standard

Importance of the Standard

In today's world, where personal audio devices are ubiquitous, understanding the impact of sound immission on hearing health is crucial. The BS EN ISO 11904-2:2021 standard provides a scientifically validated approach to measure and analyze these impacts. By using a manikin, the standard ensures that the measurements reflect real-world conditions, offering valuable insights into the potential risks associated with prolonged exposure to high sound levels.

Applications

This standard is indispensable for a wide range of applications, including:

• Product Development: Manufacturers of headphones and earphones can use this standard to design products that meet safety and performance criteria.
• Research and Development: Researchers in acoustics and audiology can leverage the standard to conduct studies on sound exposure and its effects on hearing.
• Regulatory Compliance: Organizations can ensure compliance with international safety standards by adhering to the guidelines set forth in this document.

Technical Details

The BS EN ISO 11904-2:2021 standard outlines a comprehensive technique using a manikin to simulate human auditory perception. This involves the use of advanced acoustic measurement tools and methodologies to capture sound immission accurately. The document provides detailed instructions on setting up the manikin, calibrating equipment, and conducting measurements to ensure consistency and reliability.

Benefits of Using a Manikin

Utilizing a manikin in sound immission studies offers several advantages:

• Realistic Simulation: Manikins are designed to mimic the human head and ear anatomy, providing realistic sound interaction.
• Repeatability: Measurements can be consistently repeated under controlled conditions, ensuring reliable data.
• Safety: Manikins eliminate the need for human subjects in potentially harmful sound exposure tests.

Conclusion

The BS EN ISO 11904-2:2021 standard is an essential resource for anyone involved in the field of acoustics, particularly those focused on the impact of sound immission from personal audio devices. By providing a robust framework for measurement and analysis, this standard helps ensure that products are safe for consumers and compliant with international regulations. Whether you are a manufacturer, researcher, or regulatory body, this standard is a valuable tool in your arsenal.

Embrace the precision and reliability of the BS EN ISO 11904-2:2021 standard to enhance your understanding and management of sound immission, safeguarding hearing health in an increasingly audio-centric world.

BS EN ISO 11904-2:2021

This standard BS EN ISO 11904-2:2021 Acoustics. Determination of sound immission from sound sources placed close to the ear is classified in these ICS categories:

• 13.140 Noise with respect to human beings

This document specifies basic framework measurement methods for sound immission from sound sources placed close to the ear. These measurements are carried out with a manikin, equipped with ear simulators including microphones. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results are given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the manikin technique.

This document is applicable to exposure to sound from sources close to the ear, for example during equipment tests or at the workplace to sound from earphones or hearing protectors with audio communication facilities.

This document is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz, ISO 11904-1 can be used.