What standards apply to audible notification devices in fire alarms?

• A. ISO 9001 standards.
• B. OSHA hearing protection requirements.
• C. Local fire marshal's discretion only.
• D. NFPA 72 requirements and local code decibel or placement requirements.

Answer: (D)

Audible notification devices must meet established fire alarm performance and installation standards. The primary standards come from NFPA 72, the National Fire Alarm and Signaling Code, which defines how loud alarms must be, the sound patterns used to signal different situations, how they should be audible in various spaces, and how tests should be conducted. Local jurisdictions typically adopt NFPA 72 and may add their own requirements, such as minimum sound levels at certain locations or specific placement rules to ensure proper coverage. ISO 9001 is about quality management systems and does not govern fire alarm device performance. OSHA hearing protection requirements focus on protecting workers’ hearing, not on the design or installation of audible notification devices. Relying on the fire marshal’s discretion alone isn’t sufficient because the technical criteria are set by NFPA 72 and any locally adopted amendments, which provide enforceable decibel and placement standards.