Devices are used to receive sound so as to enhance directionality in a single microphone auditory prosthesis. A tube including a plurality of openings directs sound into a microphone located on the auditory prosthesis. Directionality of such a system is based on a constructive and destructive interference between added sound components as sound enters the openings on the tube. The spacing and size of the openings can be configured such that sounds coming towards the recipient from a predetermined direction are received, while sounds from less desirable directions are cancelled out due to sound wave phase differences.
