URL details: www.jblpro.com/en-US/product_families/en-54
URL title:
EN 54 | JBL Professional Loudspeakers
URL description:
Parts 16 and 24 of the European Union’s (EU) EN 54 standard for fire detection and alarm systems have a specific requirement for voice alarms, which output messages in the form of a voice message rather than a traditional siren. Research has demonstrated that voice messages are more effective than
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