BS EN 352-1:2020 pdf download.Hearing protectors一General requirements Part 1: Earmuffs.
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 150 g 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 hcadstrap.
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.
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 150 g 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 hcadstrap.
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.
