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Submission + - Sloshing cellphones reveal their contents 1

holy_calamity writes: UK researchers have developed software that represents a handset's battery life by using a phone's speaker and vibrator to make a device feel and sound like it contains liquid. You give it a shake to find out how much is left. The same technique can be used to represent new messages by simulating balls rattling around inside a box. It runs on recent Nokia's with accelerometers, video from the researchers explains it well.
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Sloshing cellphones reveal their contents

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Numeric stability is probably not all that important when you're guessing.