A fire alarm system is number of devices working together to detectand warn people through visual and audio appliances when smoke,fire, carbon monoxide or other emergencies are present. Thesealarms may be activated from smoke detectors, and heat detectors.
Most fire alarm systems in Europe sound like a siren with alternating frequencies. Fire alarm sounders in the United States and Canada can be either continuous or set to different codes such as Code 3. Fire alarm warning devices can also be set to different volume levels. Smaller buildings may have the alarm set to a lower volume and larger buildings may have alarms set to a higher level.
