This annex to EN 54-3 will describe the additional requirements and testing applicable to Audible fire alarm devices - Voice alarm sounders. Note: a voice alarm sounder is an audible fire alarm device that contains all the necessary components to generate and broadcast recorded voice messages.
Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.