This document is concerned with active noise reduction (ANR) earmuffs. It specifies the test methods for the determination of the active insertion loss and calculation procedures for deriving the total attenuation. For this aim, the values of sound attenuation in the passive mode also have to be known and are determined according to ISO 4869‑1. These methods are intended for steady noise exposures and are not applicable to noises containing impulsive components.
The test methods account for the acoustical interaction between the wearer and the device using measurements of passive (REAT) and active microphone-in-real-ear (MIRE) measurements as specified in ISO 4869‑1 and ISO 11904‑1, respectively.
Status: PublishedPublication date: 2019-02
Edition: 1Number of pages: 11
Technical Committee: ISO/TC 43/SC 1 Noise
- ICS :
- 13.340.20 Head protective equipment
This standard contributes to the following Sustainable Development Goal:
Buy this standard
|std 1 61|
|std 2 61||Paper|
ISO 4869-6:2019Stage: 60.60
Got a question?
Check out our FAQs
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)
Keep up to date with ISO
Sign up to our newsletter for the latest news, views and product information.