The MEMS microphone market can be divided into three major segments: notebook and netbook computers, smartphones and tablets, and accessories. Each market segment has its own unique set of requirements. Most notebook computers use digital MEMS microphones for noise immunity and for performance matching in a relatively large top-port package with a standard footprint. Mobile applications such as tablets and smartphones are most concerned about performance and size and use both analog and digital microphones with both top and bottom ports. Finally, accessories such as corded mic/headsets primarily use analog microphones for compatibility with analog mic inputs and for low latency in applications such as noise-cancelling headphones.