Zero Armour’s anti-noise earplugs model F-1901 is made in compliance with EN 352-2:2002 – Hearing protectors – Ear plugs standards.
The second section of the EN352 standards, EN 352-2:2002, specifies the constructional, design, performance and marking requirements for EN 352 compliant ear plugs. This includes specification for the sound attenuation of the ear plugs, measured in accordance with EN 24869-1.
Ergonomic aspects of the ear plugs are addressed by taking into account the interaction between the wearer, device and, where possible, the working environment in which the device is likely to be used.
The markings for EN 352-2 may only appear on the packaging; these include the standard number, manufacturer and model identification. In addition to these markings the packaging for EN 352-2 ear plugs should also state whether they are disposable or reusable, have fitting instructions, include the nominal size of formable plugs (ranging from 5-14mm), and custom moulded ear plugs should have LEFT/RIGHT differentiation.
Ear plugs are tested for many of the properties outlined above in EN 352-1:
• Sizing and adjustability
• Materials and construction
• Resistance to damage when dropped
• Ignitability
• Minimum attenuation
There are, however, some small differences to testing methods in EN 352-2. Custom moulded ear plugs are not tested for sizing and adjustability, and with reusable ear plugs, the method of cleaning and disinfection specified is assessed to ensure it causes no significant alteration to the acoustic performance or to the material and construction properties.