Endfire microphone arrays are required to be pointed at the sound of interest and will only capture sound that is directly in front of the array, making handheld microphones a good application for this topology. They are constructed by arranging a line of microphones in the direction of the desired sound source, where the desired sound arrives at each microphone with a different time delay. Each microphone’s processing circuit may employ an electronic time delay to compensate for the audio time delay of the microphones.