A recent patent filing reveals about Apple’s investigation of developing the velocity sensing function with more advanced features.
In the latest iOS 7, an application called GarageBand has been added, which includes a feature of reducing or increasing the power of pressing a key on a virtual keyboard, related to the pressure applied by the user.
Apple Balla reports that in spite of the association of advanced accelerometers in the current procedure, a recently revealed patent application, exposed by the US Patent and Trademark Office, describes that different devices, such as: gyroscope, microphone, Hall Effect Sensor, compass, ambient light sensor, proximity sensor, camera and a positioning system, can be used in order to measure the touch velocity.
Due to the single axis based calculation, a built-in accelerometer is less accurate in determining the velocity. Nonetheless, it can be enhanced dramatically provided that the number of sensors is increased.
If Apple is able to employ the new method successfully, the accuracy of estimating velocity will see a significant increase.