Surface Interface

Concepts and technologies are disclosed herein for a surface interface. According to one aspect of the concepts and technologies disclosed herein, a system can include a plurality of surface transducers, a user transducer, and a user device. The plurality of surface transducers are in contact with a surface that is to be used as an input interface for a user. The user transducer is in contact with the user. The user device can include a processor and memory. The memory can stores instructions that, when executed by the processor, cause the processor to perform operations. In particular, the processor can analyze a received portion of a signal to determine a relative location of a part of a body of the user on the surface, and can perform a function responsive to the relative location of the part of the body of the user on the surface.