PRODUCT – 2013.08.20
EN54-24 P.A. Speaker
Fire Detection and Fire Alarm System EN 54-24
The purpose of a voice alarm loudspeaker as a component of a voice alarm system is to provide intelligent warning to person(s) within, or nearby, a building in which a fire emergency has occurred and to enable such person(s) to take appropriate measures against a pre-determined evacuation plan.
The primary reason for using a voice alarm system instead of the coded warnings given by sounders is to reduce the time taken for those at risk to recognize an emergency, and to give clear instructions on what to do next. This means that voice alarm loudspeakers need to achieve a minimum acoustic performance, as well as constructional and environmental requirements, to be suitable for use in fire detection and fire alarm systems.
The EN-54-24 standard recognizes that the exact nature of the acoustic requirements for voice alarm loudspeakers will vary according to the nature of the space into which there are installed. Therefore specifies the minimum requirements that apply to voice alarm loudspeakers and a common method for testing their operational performance against parameters specified by the manufacturers.
European Standard gives common requirements for the construction and robustness of voice alarm loudspeakers as well as their performance under climatic and mechanical conditions which are likely to occur in the service environment. As the types of loudspeaker considered in this European Standard are passive electromechanical devices not involving sensitive electronic circuits, electromagnetic
compatibility (EMC) tests have not been included. The loudspeakers have been classified in either an indoor or an outdoor application environment category.
European Standard specifies requirements, test methods and performance criteria for loudspeakers intended to broadcast a warning of fire between a fire detection and fire alarm system and the occupants of a building.
European Standard specifies loudspeakers for two types of application environment: type A, generally for indoor use and type B, generally for outdoor use.
European Standard does not cover loudspeakers for special applications, for example loudspeaker for use in hazardous applications, if such applications require additional or other requirements or tests than those given in this European Standard.
European Standard is not intended to cover addressable loudspeakers, loudspeakers with active components.
Transducer which converts electrical energy into acoustical energy, comprising one or more drive units, one or more enclosures, a cable termination block, and relevant devices such as filters, transformers and any passive element Some loudspeakers are
a combination of one or more loudspeaker housing(s) and a termination box interconnected by a cable. The loudspeaker housing(s), cable(s) and terminal box should be considered to be ‘the loudspeaker’ for the purposes of this European Standard. Examples of such loudspeakers include: pendant types and loudspeakers with mechanically adjustable orientation such as horn or column loudspeakers and loudspeaker arrays.