A directional microphone assembly for a hearing aid is disclosed. The hearing aid has one or more microphone cartridges (103), and first (105) and second (107) sound passages. Inlets to the sound passages, or the sound passages themselves, are spaced apart such that the shortest distance between them is less than or approximately equal to the length of the microphone cartridges. A sound duct and at least one surface (117) of the microphone cartridge may form each sound passage, where the sound duct is mounted with the microphone cartridge. Alternatively, each sound duct may be formed as an integral part of the microphone cartridge.
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