A mobile device configured to measure a touch pressure of a touch input made by a user to a touch screen display panel using a sound generated by the touch input, and a method of using the same, are disclosed. In one aspect, the mobile device includes a touch screen display panel configured to sense a touch input made by a user to the touch screen panel and output a coordinate value of the sensed touch input. The mobile device additionally includes a voice recognition device configured to sense a touch sound signal generated by the touch input. The mobile device further includes a touch pressure sensing unit configured to determine a touch pressure of the touch input based on the coordinate value and a sound level of the touch sound signal.