音頻應用中麥克風的MEMS技術

　　音頻應用中麥克風的MEMS技術

　　新一代的麥克風為新功能、高質量的音頻和更低的成本打開了機會。

　　使用相同的CMOS硅技術集成電路，微機械器件（MEMS）比傳統的麥克風更小，更可靠，可以表面安裝。這允許麥克風被放置在許多不同的地方，開辟新的功能，如噪聲消除，以及允許安裝麥克風陣列，用于檢測和指導音頻流的方向。

　　微機械加工采用標準CMOS工藝技術的變化，在硅中構建物理結構而不是電子結構。這些可以在加速度計和陀螺儀麥克風或運動傳感器膜片的設計不同，利用老舊的工廠，成本更有效。

　　Using CMOS technology also allows standard interfaces to be implemented on the same silicon， increasing the integration and reducing both the system power consumption， as there are less chip-to-chip connections， and the overall bill of materials. As the reliability has improved， these factors have driven the technology into the consumer market， particularly in mobile phones. The low profile and surface-mount capability that comes from the MEMS approach means the microphones can be mounted easily anywhere in a design and allows the end equipment to be thinner.

　　These devices are used in high volumes in mobile terminals， laptop and notebook computers as well as voice-over-IP terminals， and digital still and video cameras. Also， they are increasingly being used to provide voice control in gaming and virtual-reality input devices and even for industrial systems， as well as noise cancellation and even antitheft systems.