Standard

ISO 4869-1:1990

Withdrawn

Note: This standard has a new edition: ISO 4869-1:2018

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Abstract

Specifies a method for measuring sound attenuation at the threshold of hearing. The procedure is designed to yield values close to the maximum attenuation which are not normally attained under field conditions. The values reflect the attenuating characteristics only to the extent that users wear the device in the same manner as did the test subjects. Data are collected at low sound pressure levels but which are also representative of the values at higher sound pressure levels.

Document information

  • Standard from ISO
  • Published:
  • Withdrawn:
  • Edition: 1
  • Version: 1
  • Document type: IS
  • ICS 13.340.20
  • ISO TC ISO/TC 43/SC 1

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