MEMS microphones can be placed in physical arrays to enhance the signal quality of the output from the microphones; also known as beamforming. Signals can be extracted from noisy environments by adding the input signals of the desired sound and subtracting the input signals of the undesired sounds. This is useful in environments where ambient noise is high, such as conference rooms or motor vehicles. Another practical application of microphone arrays is to locate the direction a particular sound is coming from. Implementing these microphone arrays requires microphones with well-matched characteristics to generate the signals, which is where the tight sensitivity tolerances of MEMS microphones come into play. The host system will incorporate digital signal processing (DSP) capabilities to perform the necessary calculations on the microphone signals.