BS EN ISO 389-7:2019 Acoustics Standard

Welcome to the world of precision and accuracy in audiometric equipment calibration with the BS EN ISO 389-7:2019 Acoustics Standard. This essential document serves as a cornerstone for professionals in the field of audiology, ensuring that audiometric equipment is calibrated to the highest standards, thereby guaranteeing reliable and consistent hearing assessments.

Overview

The BS EN ISO 389-7:2019 is a comprehensive standard that provides the reference zero for the calibration of audiometric equipment. It is specifically designed to establish the reference threshold of hearing under both free-field and diffuse-field listening conditions. This standard is crucial for audiologists, acoustic engineers, and other professionals who require precise calibration of audiometric devices to ensure accurate hearing assessments.

Key Features

• Standard Number: BS EN ISO 389-7:2019
• Pages: 20
• Released: 2019-12-06
• ISBN: 978 0 539 03231 4
• Status: Standard

Importance of Calibration

Calibration is a critical process in the field of audiology. It ensures that audiometric equipment provides accurate measurements, which are essential for diagnosing hearing impairments and determining appropriate interventions. The BS EN ISO 389-7:2019 standard provides the necessary guidelines to achieve this level of precision, making it an indispensable tool for professionals in the industry.

Applications

This standard is applicable in various settings, including:

• Audiology Clinics: Ensuring that audiometric tests are conducted with equipment that meets the highest standards of accuracy.
• Research Laboratories: Providing a reliable reference for experiments and studies involving auditory perception and hearing thresholds.
• Manufacturing: Assisting manufacturers of audiometric equipment in designing and producing devices that comply with international standards.

Understanding Free-Field and Diffuse-Field Conditions

The BS EN ISO 389-7:2019 standard addresses two critical listening conditions:

• Free-Field: This condition refers to an environment where sound can propagate freely without any reflections or obstructions. It is essential for determining the purest form of sound perception.
• Diffuse-Field: In contrast, a diffuse-field environment is characterized by sound reflections from various surfaces, creating a uniform sound field. This condition is crucial for understanding how sound is perceived in real-world environments.

Why Choose BS EN ISO 389-7:2019?

Choosing the BS EN ISO 389-7:2019 standard means opting for precision, reliability, and international recognition. This standard is part of a series of ISO standards that are globally acknowledged for their rigor and comprehensiveness. By adhering to this standard, professionals can ensure that their audiometric equipment is calibrated to deliver the most accurate results, thereby enhancing the quality of hearing assessments and interventions.

Conclusion

In the ever-evolving field of audiology, staying updated with the latest standards is crucial. The BS EN ISO 389-7:2019 Acoustics Standard is an invaluable resource for professionals seeking to maintain the highest levels of accuracy and reliability in their work. With its detailed guidelines and international recognition, this standard is a must-have for anyone involved in the calibration of audiometric equipment.

Embrace the precision and reliability that the BS EN ISO 389-7:2019 standard offers and ensure that your audiometric equipment meets the highest standards of calibration. This investment in quality will not only enhance your professional practice but also contribute to better hearing health outcomes for your clients.

BS EN ISO 389-7:2019

This standard BS EN ISO 389-7:2019 Acoustics. Reference zero for the calibration of audiometric equipment is classified in these ICS categories:

• 13.140 Noise with respect to human beings

This document specifies a reference threshold of hearing for the calibration of audiometric equipment used under the following conditions.

1. The sound field in the absence of the listener consists of either a free progressive plane wave (free field) or a diffuse sound field, as specified in ISO 8253-2 . In the case of a free field, the source of sound is directly in front of the listener (frontal incidence).

2. The sound signals are pure (sinusoidal) tones in the case of free-field conditions and one-third-octave bands of (white or pink) noise in the case of diffuse-field conditions.

3. The sound pressure level is measured in the absence of the listener at the position where the centre of the listener’s head would be.

4. Listening is binaural.

The data are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz inclusive in accordance with ISO 266 and, in addition, for some intermediate audiometric frequencies up to 18 000 Hz.

The threshold data differ from the audiometric zero specified in ISO 389-1, ISO 389-2, ISO 389-5 and ISO 389-8, since the latter refer to monaural listening through earphones with sound pressure levels referred to specified couplers and ear simulators. Direct comparison between the data in the parts of ISO 389 mentioned above and in this document is therefore not appropriate.