Abstract: Processing an audio signal is disclosed. The audio signal is received from a sensor coupled to a touch input medium. An indication of an event where the touch input medium has been contacted at a location on the touch input medium is received. The event has been captured as an audio signal component of the received audio signal. At least a portion of the audio signal component is reduced from the audio signal.

Abstract: Providing a virtual keyboard interaction is disclosed. An indicator identifying a force intensity of a touch input provided on a touch input surface is received. It is determined that the touch input is associated with a virtual keyboard. A virtual keyboard interaction is provided based at least in part on the indicator identifying the force intensity of the touch input.

Abstract: Controlling an audio volume is disclosed. An indicator identifying a force intensity of a touch input provided on a touch input surface is received. It is determined that the touch input is associated with an audio volume control. The audio volume is controlled based at least in part on the indicator identifying the force intensity of the touch input.

Abstract: Detecting a touch input force is disclosed. A signal to be used to propagate a propagating signal through a propagating medium with a surface is sent. The propagating signal that has been disturbed by a touch input with an amount of force on the surface is received. The received signal is processed to determine an identifier associated with the amount of force.

Abstract: Providing a user interface interaction is disclosed. A first set of one or more indicators associated with a first location on a touch input surface and a first force intensity of a touch input provided on the touch input surface is received. A user interface object associated with the first location is determined. A second set of one or more indicators associated with a second location on the touch input surface and a second force intensity of the touch input that has been in continuous contact with the touch input surface at least since the touch input was provided at the first location is received. The user interface interaction based at least in part on the user interface object, the first set of indicators, and the second set of indicators is provided.

Abstract: A haptic feedback system is disclosed. The system includes a plurality of remote transmitters that are remote from a location of interest on a surface of the system. The system includes a signal generator that generates a signal for each of the remote transmitters. The remote transmitters propagate the signals through a medium of the surface and the signals interfere at the location of interest such that a localized disturbance is generated at the location of interest.

Abstract: A system for determining a user indication is disclosed. The system includes a communication interface configured to send a signal to be used to propagate a freely propagating signal through a propagating medium with a surface and receive the freely propagating signal that has been disturbed by a disturbance on the surface. The system also includes a processor coupled to the communication interface and configured to process the received signal to determine a user indication associated with the disturbance.