A fire alarm is a device that detects and alerts people to the presence of fire or smoke. It is an important safety device that can help to save lives and property. Fire alarms can be triggered by smoke, heat, or both. When a fire alarm is triggered, it will typically sound a loud, piercing sound to alert people to the danger.
There are many different types of fire alarms available, each with its own advantages and disadvantages. Some common types of fire alarms include: