It's pretty hot where I live, so we usually leave our garage door open so that the breeze can funnel right through our house. However, in order to leave our door open we must turn on our trusty alarm that makes a -dum-dum-dun-dun sort of sound whenever some one or something enters. So this Sunday when I walked to unlock my car, the alarm went off. This triggered a thought in my head, "I wonder if this alarm has anything to do with physics". So here I am writing about the alarm. I believe that the alarm can detect motion and therefore gives off the sound. The movement from an object triggers the little microchip in the alarm to ring the alarm, creating sound waves which then travel to our ears. Another thing that also fascinates me is that it is able to create an invisible wave/wall of sensory detectors to pick up the motion.
AWESOME!
2 comments:
makana mofunna! cool findings.
:)
Is the alarm a single beam that gets tripped by your legs? What is the frequency of the dum-dum-dun-dun? I want to know more, Makana!
And wow, Kari, you comment fast!
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