Microsoft has come up with a gesture to turn devices on silent by whacking them.

Microsoft plans to introduce a new feature on its next range of Windows Mobile phones called ‘whack-based audio control module.’ The technology allows the user to reject a call while turning it on silent simply by smacking the device.

Microsoft stated in the patent that, “There are a variety of circumstances under which it may be desirable to quickly control a device without having to interact with a traditional user interface.” For example, when a user forgets to set the mobile phone on silent and the device rings during an important moment, like in a meeting or a movie theater.

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