ISO 7240-24-2016 PDF

Full title and description

ISO 7240-24:2016 — Fire detection and fire alarm systems — Part 24: Fire alarm loudspeakers. Specifies requirements, test methods and performance criteria for loudspeakers intended to broadcast fire warnings from a fire detection and alarm system to building occupants; defines two application environment types (Type A — generally indoor, Type B — generally outdoor) and excludes loudspeakers for special hazardous applications, addressable loudspeakers and loudspeakers with active electronic components.

Abstract

ISO 7240-24:2016 sets out performance, construction and environmental requirements and the associated test methods for fire alarm loudspeakers used to provide intelligible voice and warning messages as part of a fire detection and alarm system. The standard addresses frequency response, durability, materials, ingress protection, mounting and test conditions, and distinguishes indoor and outdoor application types.

General information

• Status: Published (confirmed at review in 2021).
• Publication date: April 2016 (Edition 2, April 2016 / published 8 April 2016 in several catalogues).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.220.20 — Fire protection / Fire detection and alarm systems.
• Edition / version: 2 (2016).
• Number of pages: 39 pages.

Key bibliographic and lifecycle details (status, edition, pages and ICS) are recorded in the ISO bibliographic entry for ISO 7240-24:2016.

Scope

This part of ISO 7240 specifies requirements, test methods and performance criteria for loudspeakers intended to broadcast a warning of fire between a fire detection and alarm system and occupants of a building. It covers two application types (Type A — generally for indoor use; Type B — generally for outdoor use). It does not cover loudspeakers for special/hazardous applications that require additional tests or requirements, addressable loudspeakers, or loudspeakers containing active electronic components. Audible alarm indicators are addressed in ISO 7240-3.

Key topics and requirements

• Performance criteria for speech intelligibility and signal level (frequency response limits and sensitivity measurement requirements).
• Durability and constructional requirements (materials, provision for external conductors, access and mechanical construction).
• Environmental and ingress protection requirements for indoor (Type A) and outdoor (Type B) applications.
• Test methods and conditions (atmospheric and operating test conditions, mounting, tolerances, and measurement procedures).
• Exclusions and application limits (not covering hazardous-area loudspeakers, addressable loudspeakers, or loudspeakers with active components).

These technical topics and the required tests are described in detail in the standard text and associated normative references.

Typical use and users

Used by manufacturers of fire alarm loudspeakers, product test laboratories, fire and life-safety engineers, system integrators, building services designers and regulatory bodies to design, test, specify and approve loudspeakers intended for use in fire alarm and voice alarm systems. Also referenced in procurement and conformity assessment activities where audible voice/warning performance and environmental robustness are required.

Related standards

ISO 7240-24 sits within the ISO 7240 series on fire detection and alarm systems. Related parts commonly referenced include ISO 7240-1 (general requirements and system overview), ISO 7240-3 (audible alarm devices), ISO 7240-19 (voice alarm control and indicating equipment) and other part-specific standards (for example parts addressing detectors and transmission paths). The 2016 edition replaces the 2010 edition and its 2013 amendment.

Keywords

fire alarm loudspeakers; voice alarm; fire detection and alarm systems; ISO 7240; speech intelligibility; ingress protection; Type A indoor; Type B outdoor; test methods; performance criteria.

FAQ

Q: What is this standard?

A: ISO 7240-24:2016 is an international standard that specifies requirements, test methods and performance criteria for loudspeakers used to broadcast fire warnings and voice instructions as part of a fire detection and alarm system.

Q: What does it cover?

A: It covers functional and constructional requirements, environmental and durability criteria, frequency response and sensitivity measurement, and defined test methods for Type A (generally indoor) and Type B (generally outdoor) fire alarm loudspeakers. It excludes hazardous-area loudspeakers, addressable loudspeakers and loudspeakers with active electronics.

Q: Who typically uses it?

A: Manufacturers, test laboratories, system designers, installers, certifiers and authorities having jurisdiction who need to ensure that loudspeakers meet minimum performance and environmental requirements for use within fire alarm/voice alarm systems.

Q: Is it current or superseded?

A: ISO 7240-24:2016 is the current (second) edition published in 2016 and the ISO bibliographic record indicates the publication was reviewed and confirmed in 2021, so the 2016 edition remains the active version. It replaced the 2010 edition and its 2013 amendment.

Q: Is it part of a series?

A: Yes — it is Part 24 of the ISO 7240 series covering fire detection and alarm systems; the series contains multiple parts addressing detectors, notification devices, control equipment and related items.

Q: What are the key keywords?

A: Fire alarm loudspeakers, voice alarm, speech intelligibility, test methods, performance criteria, Type A (indoor), Type B (outdoor), ISO 7240.