BS/EN 352-8-2020 pdf download.Hearing protectors – Safety requirements Part 8 : Entertainment audio earmuffs.
This document is applicable to entertainment audio earmuffs. It specifies requirements on construction, design, performance, marking and user information relating to the inclusion of the entertainment audio facility.
Entertainment audio earmuffs use a wired or wireless system through which audio entertainment can be relayed. They may incorporate a radio receiver set or music player for entertainment or allow audio input from external devices.
They also offer the possibility to communicate warning signals or messages. The product standards impose a limitation on the reproduced sound pressure level at the ear.
The entertainment audio signal can be transmitted by radio (broadcast or local plant programmes) or by wire or other communication like Bluetooth.
2 Normative references
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 352-1:2020, Hearing protectors — General requirements — Part 1: Earmuffs
EN 352-3:2020, Hearing protectors — Genera! requirements — Part 3: Earmuffs attached to head protection and/or face protection devices
EN 13819-3:20 19, Hearing protectors — Testing — Part3:Supplementary acoustic test methods 3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 352-1:2020, EN 352-3:2020 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http:/Jwww.electropedia.org/
• ISO Online browsing platform: available at b1tiw,ww.i≤argj≤hp
3.1
entertainment audio earmuff
earmuff additionally providing reproduced sound for entertainment purposes
Note 1 to entry: It may be designed with an electrical audio input, with built-in broadcast receivers or with other built-in wireless receivers like Bluetooth. Or it may be part of a complete system composed of transmitters and receiving audio earmuffs.
The equivalent sound output levels of the test samples shall be tested in accordance with the appropriate procedure from EN 13819-3:2019 (7.4.2, 7.5.1 or 7.6.1) and reported in the test report. The mean value of 16 measurements plus one standard deviation shall not exceed 82 dB(A). In cases where a manufacturer has designed left and right cups in a different way (especially in terms of sound pressure level effective to the ear), neither the mean value of 8 measurements of left cups plus one standard deviation nor the mean value of 8 measurements of right cups plus one standard deviation shall exceed 82 dB(A).
4.2.1.2 Earmuffs with built-in broadcast receivers for FM radio
The procedure from EN 13819-3:2019, 74.2 shall be used. The sound output levels are determined for the FM radio signal defined In EN 13819-3:2019, 7.4.2.1 with one specifIc signal level.
4.2.1.3 EntertaInment audio earmuffs with electrical audio Input
The procedure from EN 13819-3:2019, 7.6.1.2.3 shall be used. The sound output levels shall be measured up to 150 mV or up to the maximum input voltage as specified by the manufacturer (whichever is larger).
NOTE I This requirement corresponds to the maximum output voltage of a personal music player of 150 mV according to EN 62368-1:2014+AC:2015, 10.6.2,2 if the test signal from EN 50332-1:2013 is applied.
NOTE 2 EN 50332-1:2013 and EN 50332-2:2013 contain the test procedures for the maximum sound pressure levels of personal music players.
4.2.1.4 Entertainment audio earmuffs with built-in Bluetooth receivers
The procedure from EN 13819-3:2019, 7.5.1 shall be used. The sound output levels are determined for the Bluetooth signal defined in EN 138 19-3:2019, 7.5.1.2.3.
4.2.1.5 Complete systems composed of transmitters and entertainment audio earmuffs
EN 13819-3:2019, 5.4 and 6.5 shall be used. The transmitting, receiving and amplifying devices shall be adjusted to maximum setting.
5 Marking
The marking specified in EN 352-1:2020 (or EN 352-3:2020, as appropriate) shall be used. No additional marking is needed.
6 Manufacturer’s instructions and information
The information specifIed In EN 352-1:2020 (or EN 352-3:2020, as appropriate) and the following additional information shall be supplied with the earmuffs:BS/EN 352-8-2020 pdf download.