BS EN ISO 4869-1:2018

What is ISO 4869‑1- Subjective method for the measurement of sound attenuation for hearing protectors about?

ISO 4869‑1 discusses hearing protectors. ISO 4869‑1 is an international standard that provides a subjective method for the measurement of sound attenuation for hearing protectors to ensure protection against hazardous noise at the workplace. ISO 4869‑1 is the first part of a multi-part series that specifies a subjective method for measuring sound attenuation of hearing protectors at the threshold of hearing. The method specified by is a laboratory method designed to yield reproducible values under controlled measurement conditions. The values reflect the attenuating characteristics of the hearing protector only to the extent that users wear the device in the same manner as did the test subjects. Note: Due to masking from physiological noise in the occluded ear tests, sound attenuations below 500 Hz can be overestimated by a few decibels.