MICROPHONE UNIT AND AUDIO INPUT DEVICE PROVIDED WITH SAME

摘要

The disclosed microphone unit (1) is provided with a casing (10) that houses a first oscillation unit (13) and a second oscillation unit (15) and that is provided with a first sound hole (23) and a second sound hole (25). The casing (10) contains a mounting section (11) that has a mounting surface (11a) to which the first oscillation unit (13) and the second oscillation unit (15) are mounted, and that is provided with the first sound hole (23) and the second sound hole (25) on the back surface (11b) of the mounting surface (11a); and the casing (10) is provided with a first sound path (41) that transmits sound waves input from the first sound hole (23) to one surface of a first oscillation plate (134) and to one surface of a second oscillation plate (154), and a second sound path (42) that transmits sound waves input from the second sound hole (25) to the other surface of the second oscillation plate (154). The other surface of the first oscillation plate (134) faces a hermetically sealed space that is formed within the casing (10).