Patent Number: 7,089,069

Title: Method and apparatus for reconstruction of soundwaves from digital signals

Abstract: Each of a plurality of speaklets (MEMS membranes) produces a stream of clicks (discrete pulses of acoustic energy) that are summed to generate the desired soundwave. The speaklets are selected to be energized based on the value of a digital signal. The greater the significance of the bit of the digital signal, the more speaklets that are energized in response to that bit. Thus, a time-varying sound level is generated by time-varying the number of speaklets emitting clicks. Louder sound is generated by increasing the number of speaklets emitting clicks. The present invention represents a substantial advance over the prior art in that sound is generated directly from a digital signal without the need to convert the digital signal first to an analog signal for driving a diaphragm.

Inventors: Gabriel; Kaigham (Pittsburgh, PA), Neumann, Jr.; John J. (Pittsburgh, PA), Diamond; Brett M. (Pittsburgh, PA)

Assignee: Carnegie Mellon University

International Classification: G06F 17/00 (20060101); H04R 3/00 (20060101)

Expiration Date: 8/08/02018