APPARATUS OF HOUSING FOR MEMS CONDENSER MICRO-PHONE

摘要

PURPOSE: A housing apparatus for a MEMS(Micro Electro Mechanical System) condenser microphone is provided to control a frequency response curve by controlling each wavelength sound volume of an acoustic signal coming into a microphone. CONSTITUTION: A first acoustic guide(202) is formed in a region adjacent to an acoustic hole(201) formed on a certain region of a holder cap(200). A secondary hole or secondary molding is used in order to change the wavelength of an acoustic signal entering inside the remaining region of the holder cap through the acoustic hole. A second acoustic guide(203) is formed in the region which is symmetrical with the first acoustic guide. The first acoustic guide and the second acoustic guide are formed at a lower portion of the holder cap into a groove shape having a constant thickness. The size of the first acoustic guide and the second acoustic guide can be formed to be identical or different.