| 摘要 |
A capacitive microphone for generating an output signal which is a function of a capacitance between a moveable electrode and a fixed electrode separated by at least one layer disposed therebetween, wherein the at least one layer includes at least one spacer layer formed from one or more sheets of material. By selecting an appropriate thickness and shape of the spacer layer, the separation between the first and second electrodes can be accurately controlled. Large area microphones can be made by configuring the spacer layer such that it supports one or more central regions of the movable electrode. In one embodiment, the spacer layer is formed from a sheet of polymer material, such as polyester.
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