System and Method for a Pumping Speaker

A microspeaker comprising:

• a plurality of electrodes comprising a first electrode and a second electrode;
• an upper backplate comprising
• a first set of electrical partitions electrically coupled to the first electrode, and
• a second set of electrical partitions electrically coupled to the second electrode;
• a lower backplate;
• a flexible membrane disposed between the upper backplate and the lower backplate;
• wherein the plurality of electrodes are configured to cause the flexible membrane to oscillate at a first frequency above an upper audible frequency limit;
• and
• wherein the plurality of electrodes are configured to generate an acoustic signal having a second frequency below the upper audible frequency limit by adjusting the oscillating of the flexible membrane;
• and
• wherein adjusting the oscillating of the flexible membrane comprises simultaneously applying different voltages to the first electrode and the second electrode.

A method of operating a microspeaker, the method comprising:

• pumping at a first frequency above an upper audible frequency limit by causing a flexible membrane to oscillate using a plurality of electrodes, wherein
• the plurality of electrodes comprise a first electrode and a second electrode,
• the first electrode is electrically coupled to a first set of electrical partitions of an upper backplate of the microspeaker, and
• the second electrode is electrically coupled to a second set of electrical partitions of the upper backplate;
• and
• simultaneously applying different voltages to the first electrode and the second electrode to adjust the pumping of the flexible membrane to generate an acoustic signal having a second frequency below the upper audible frequency limit.