Which type of fire alarm notification device produces a loud sound?

The correct answer is horns or bells, as these devices are specifically designed to produce a loud and attention-grabbing sound in the event of a fire alarm activation. Their primary function is to alert occupants to evacuate or take necessary actions for safety. Horns and bells can penetrate ambient noise levels, ensuring that individuals in various environments are effectively alerted to potential danger.

Other options serve different purposes. Visual alarms, for instance, are crucial for alerting individuals who are hearing impaired through flashing lights but do not produce sound. Vibration devices are designed for individuals with hearing loss, creating physical sensations rather than auditory signals. Messaging systems convey information through text or audio messages but do not necessarily emit a loud sound intended for immediate alerting. Each of these plays an important role in a comprehensive fire alarm system but does so in a manner that caters to different needs within the community.