An air pulse generating element, comprising: a chamber; a membrane, disposed in the chamber, wherein a membrane driving voltage (V MBN) is configured to drive the membrane to perform an up-and-down movement; and a plurality of valves (601, 602), disposed by the membrane, configured to seal a plurality of openings of the chamber in which the membrane is disposed, in response to a plurality of valve control signals; wherein the plurality of valves comprises: a first valve, controlled by a first valve control signal (G'), configured to seal a first opening of the chamber at a first time and to seal a second opening of the chamber at a second time; a second valve, controlled by a second valve control signal (H'), configured to seal a third opening of the chamber at a third time and to seal a fourth opening of the chamber at a fourth time; characterized in that, the membrane and the plurality of valves (601, 602) are coplanar, and all disposed and fabricated at a first layer; wherein the first opening is formed on a first faceplate of the air pulse generating element, and the first faceplate is disposed at a second layer; wherein the second opening is formed on a second faceplate of the air pulse generating element, and the second faceplate is disposed at a third layer; wherein the third opening is formed on the first faceplate of the air pulse generating element; wherein the fourth opening is formed on the second faceplate of the air pulse generating element; wherein the first layer is disposed between the second layer and the third layer. a chamber; a membrane, disposed in the chamber, wherein a membrane driving voltage (V MBN) is configured to drive the membrane to perform an up-and-down movement; and a plurality of valves (601, 602), disposed by the membrane, configured to seal a plurality of openings of the chamber in which the membrane is disposed, in response to a plurality of valve control signals; wherein the plurality of valves comprises: a first valve, controlled by a first valve control signal (G'), configured to seal a first opening of the chamber at a first time and to seal a second opening of the chamber at a second time; a second valve, controlled by a second valve control signal (H'), configured to seal a third opening of the chamber at a third time and to seal a fourth opening of the chamber at a fourth time; a first valve, controlled by a first valve control signal (G'), configured to seal a first opening of the chamber at a first time and to seal a second opening of the chamber at a second time; a second valve, controlled by a second valve control signal (H'), configured to seal a third opening of the chamber at a third time and to seal a fourth opening of the chamber at a fourth time; characterized in that, the membrane and the plurality of valves (601, 602) are coplanar, and all disposed and fabricated at a first layer; wherein the first opening is formed on a first faceplate of the air pulse generating element, and the first faceplate is disposed at a second layer; wherein the second opening is formed on a second faceplate of the air pulse generating element, and the second faceplate is disposed at a third layer; wherein the third opening is formed on the first faceplate of the air pulse generating element; wherein the fourth opening is formed on the second faceplate of the air pulse generating element; wherein the first layer is disposed between the second layer and the third layer. wherein the first opening is formed on a first faceplate of the air pulse generating element, and the first faceplate is disposed at a second layer; wherein the second opening is formed on a second faceplate of the air pulse generating element, and the second faceplate is disposed at a third layer; wherein the third opening is formed on the first faceplate of the air pulse generating element; wherein the fourth opening is formed on the second faceplate of the air pulse generating element; wherein the first layer is disposed between the second layer and the third layer.