BS EN 352-1:2020 pdf free.Hearing protectors – General requirements. Earmuffs.
BS EN 352-1 This document specifies requirements for construction, design, performance, marking and user information for earmuffs.In particular, it specifies requirements regarding the sound attenuation of the earmuffs, measured in accordance with EN ISO 4869-1:2018.The document does not apply to earmuffs outside the size range of headsizes as defined in this
document. This document does not apply to earmuffs for attachment to head protection and/or face protection devices.Ergonomic aspects are addressed by taking into account, within the requirements, the interaction between the user, the device and where possible the working environment in which the device is likely to be used (see Annex ZA and EN 458).The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.EN 13819-1:2020, Hearing protectors一Testing 一Part 1: Physical test methods
EN 13819-2:2020, Hearing protectors 一Testing 一Part 2: Acoustic test methods EN ISO 4869-2:2018, Acoustics一Hearing protectors一Part 2: Estimation of efctive A-weighted sound
pressure levels when hearing protectors are worn (ISO 4869-2:2018) When tested in accordance with EN 13819-1:2020, 4.7, the earmuffs (except for replaceable cushions) shall remain intact and fully functional as a passive hearing protection. Neither shall any part of the earmuffs become detached, such that correct reassembly requires the use of either a tool or a
replacement part. If the requirements of this subclause are met, the information shall be supplied to the user with the earmuffs according to Clause 6 fD, as appropriate.The headband force of each specimen shall not change by more than士 15 % from that reported according to 4.3.4 after the earmuffs have been subjected to the appropriate conditioning and tests specified in EN 13819-1:2020, 4.1.3.7 a) to i]. If the headband force according to 4.3.4 was measured for more than one size adjustment, the土15 % limit shall apply only to the size adjustment which gave the highest initial force. The comparison between the results before and after conditioning shall be performed for the headband force of each specimen separately. Additionally, and in all cases, the final headband force of each specimen shall not exceed 14 N. For universal earmuffs the test shall be performed in the over-the-head wearing mode only. If the test according to EN 13819-1:2020, 4.11,(headband under stress) has been done and the requirements of 4.3.8 of this document are met, the information according to Clause 6 e) shall be supplied to the user with the earmuffs.BS EN 352-1 pdf download.