Acoustics. Hearing protectors - Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture1 Scope This part of ISO 4869 specifies a method for measuring the insertion loss of ear muff type hearing protectors using an acoustic test fixture. The method is applicable to the investigation of production spreads of performance as part of type approval or certification procedures, and to the investigation of the change of performance with age. It is intended to ensure that ear muffhearing protector samples submitted for subjective testing of

implementation of the ISO 22313 can:

Definition workflow

NOTE In this document section toes (see EN 10055) are considered as part of the surfaces of a section

It specifies related abbreviated terms

Risk assessment of action forces

NOTE: Equipment not having at least one conducting cable (such as mains supply

maintenance and cleaning of strapping machines

BS EN 61338-4 is an international standard that discusses sectional specifications for waveguide type dielectric resonators

which are intended for retail sale

BS ISO 22010 covers all programme phases from pre-proposal through to end of life

The rating of results of measurements carried out over an enlarged frequency range is dealt with in an Annex to this standard

mechanized and automatic welding