BS EN 352-1:2020 pdf free download – Hearing protectors一General requirements Part 1: Earmuffs.
4.2 Materials and construction
4.2.1 Materials
4.2.1.1 Those parts of the earmuffs that come into contact with the skin shall be non-staining, soft and pliable.
4.2.1.2 Those parts of the earmuffs that come into contact with the skin shall not be likely to cause skin irritation, allergic reaction or have any other adverse effect on health.
NOTE A written statement confirming this requirement can be provided to the test house by the manufacturer.
4.2.1.3 All materials shall be visibly unimpaired after cleaning and disinfection by the methods
specified by the manufacturer.
4.2.2 Construction
4.2.2.1 All parts of the earmuffs shall be finished smooth and be free from sharp edges that could cause excessive irritation or injuries.
4.2.2.2 Earmuffs whose cushions and/or liners are intended by the manufacturer to be replaced by the user shall not require the use of tools for this purpose.
4.2.2.3 All universal earmuffs that have a mass in excess of iSOg shall be provided with a headstrap.
4.2.2.4 Earmuffs that are suitable for wearing only in the behind-the-head or under-the-chin modes, and that have a mass in excess of 150 g, shall be provided with a headstrap.
4.3 Performance
4.3.1 General
The requirements of 4.3.2 to 4.3.12 shall be satisfied.
Earmuffs shall be conditioned and tested in accordance with EN 13819-1:2020,4.1.1, 4.1.2 and 4.1.3.
4.3.2 Sizing and adjustability
4.3.2.1 General
Sizing and adjustability shall be tested in accordance with EN 13819-1:2020, 4.2 and the following requirements satisfied, as appropriate.
In the case of earmuffs incorporating a means to adjust the headband force, these requirements shall be satisfied at both the maximum and the minimum force setting.
4.3.2.2 ‘Medium size range’ earmuffs
a) over-the-head and under-the-chin earmuffs
For each of the combinations of test dimensions shown by the letter M in EN 13819-1:2020, Table 1, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.
b) behind-the-head earmuffs
For each of the combinations of test dimensions shown by the letter M in EN 13819-1:2020, Table 2, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.
4.3.2.3 Small size range’ earmuffs
a) over-the-head and under-the-chin earmuffs
For each of the combinations of test dimensions shown by the letter S in EN 13819-1:2020, Table 1, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.
b) behind-the-head earmuffs
For each of the combinations of test dimensions shown by the letter S in EN 13819-1:2020, Table 2, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.
4.3.2.4 Large size range’ earmuffs
a) over-the-head and under-the-chin earmuffs
For each of the combinations of test dimensions shown by the letter L in EN 13819-1:2020, Table 1, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.
b) behind-the-head earmuffs
For each of the combinations otest dimensions shown by the letter L in EN 13819-1:2020, Table 2, the range of adjustment of the cups/headband and of the width between the cushions shall enable the earmuffs to be fitted to the fixture.