A few months ago I took a safety training course. In the course the instructor showed us a video of a voice fire alarm, which talked along with emitting a shril

A few months ago I took a safety training course. In the course the instructor showed us a video of a voice fire alarm, which talked along with emitting a shrill sound. The reason was that some people, especially children, could not be awakened by the alarm sound, but will wake upon hearing a human voice. I have a mix of old and new fire alarms, and my new fire alarm does indeed talk in addition to emitting the alarm sound.