Patent ID: 8447054

Claim:
A microphone system comprising: a package having an interior and defining at least one input aperture for receiving an acoustic signal; a MEMS microphone mounted within the interior of the package and mechanically coupled to at least a portion of one input aperture in the package, the microphone having a backvolume defined by the microphone and package; and a MEMS valve coupled with at least one input aperture in the package, the valve having a valve opening generally circumscribed by a valve seat, the valve having an open mode for permitting acoustic signal access into the package interior through the valve opening, the valve also having a closed mode for substantially preventing acoustic signal access into the package interior through the valve opening, the valve having a movable member configured to contact the valve seat when in the closed mode, the movable member being configured to move between the open mode and the closed mode in a direction that is generally perpendicular to the valve seat.