9. A portable media device comprising a controller element that emits ultrasonic waveforms from ultrasonic transducers to reflect off a finger in a three-dimensional touchless sensing space; digitally samples the reflected ultrasonic waveforms off the finger to produce a sampled reflected ultrasonic waveform; tracks a relative location and movement of the finger in the three-dimensional ultrasonic sensing space from differential time of flight waveform analysis of the sampled reflected ultrasonic waveforms; suppressing a ringing portion of the emitted ultrasonic waveforms that overlaps with the sampled reflected ultrasonic waveform during the tracking; minimizing a distortion associated with ultrasonic transducer ring-down during generation of a high-resolution touchless finger signing from the suppressing; receives a search string from the touchless finger signing and presents at least one media that corresponds to at least a portion of the search string, wherein the search string includes at least one finger gesture generated in a touchless sensory field of the touchless sensing device.
15. The portable media device of claim 9 , wherein the controller element performs touchless scrolling and touchless selection of the at least one media.