Alarm clocks usually have that noisy sound intended to wake us up. Different alarm clocks come with different waking sounds but whatever the sound is, sometimes it gets very annoying especially when it wakes up the wrong person. Well, not anymore. Now, there are alarm clocks which can wake you up not by their alarming sound but by their vibration.
The noiseless alarm clock is called the Silent Alarm Clock. It was designed by Johan Brengesjo and it does its job of waking you up by means of vibration. The silent alarm clock uses a wireless rubber ring which vibrates at the time you previously set.
If you are one of those people who have a roommate who is fond of setting their alarm clock at a very early time (and who is very difficult to wake up), then you should start wishing for the silent alarm clock to hit markets. As of now, it is just a concept. Just make sure to buy one and give it to your roommate once it gets available.
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