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• 6ren 16y ago
  > if you tap softly or hard, it changes the sound How can a touch-screen detect velocity? There's no travel. (I ask because it would be cool if you can). EDIT iPad has an accelerometer, so it can measure the force at which your finger strikes the display
  • culturestate 16y ago
    They use the accelerometer.
    • dazmax 16y ago
      I wonder if it has to be on your lap or some surface that has some give for the accelerometer to properly pick up how hard you tap.
      • culturestate 16y ago
        I think for maximum accuracy (or at least, as accurate as you can be using this method - I can't wait to try it out), you're probably correct.
  • WesleyJohnson 16y ago
    They're saying it uses the accelerometer in the device itself to detect how hard you touch the screen?
    • tesseract 16y ago
      The screen is rigidly attached to the rest of the device, so yes, it should be possible to use the accelerometer (F=ma) to measure a force applied to the screen.