13. A computer-readable storage medium having instructions stored thereon that, when executed by a processor, cause the processor to perform operations comprising: generating a signal; sending the signal to a sensor network associated with a user, wherein the sensor network comprises a plurality of vibration sensors positioned at various locations on a body of the user; receiving a modified signal from the sensor network, wherein the modified signal comprises the signal received, from the device, by at least one vibration sensor of the plurality of vibration sensors and propagated by the at least one vibration sensor through at least a bone of the body of the user, thereby modifying the signal to create the modified signal; selecting a body language reference model to compare to the modified signal received from the sensor network, wherein the body language reference model identifies a plurality of body language features and associated signal features; comparing the modified signal to the body language reference model; and determining, based upon comparing the modified signal to the body language reference model, a signal feature of the modified signal that maps to a body language feature of the plurality of body language features identified in the body language reference model; and outputting the body language feature of the plurality of body language features identified in the body language reference model to an application.
14. The computer-readable storage medium of claim 13 , wherein outputting the body language feature to the application comprises outputting the body language feature to a context-aware application.