MICROPHONE CAVITY

An apparatus includes a printed wiring board (PWB) that defines an aperture. A microphone is mounted on the PWB such that the aperture provides an acoustic path to the microphone. An acoustic interface member defines a cavity that is acoustically coupled to the microphone via the aperture. A first gasket between the printed wiring board and the acoustic interface member forms an acoustic seal. A housing is included, and a second gasket is disposed between the acoustic interface member and the housing to form an acoustic seal. An acoustic chamber is defined by a sealed volume that extends froma first (bottom/inner) surface of the housing down to a junction between the microphone and the PWB. The housing defines apertures which provide an acoustic path between a region external to the housing and the acoustic chamber. The acoustic chamber and the apertures in the housing form a Helmholtz resonator. 本发明公开了一种装置，该装置包括限定孔的印刷线路板(PWB)。麦克风安装在PWB上，使得孔向麦克风提供声学路径。声学接口构件限定腔，该腔经由孔在声学耦合到麦克风。位于印刷线路板和声学接口构件之间的第一垫圈形成声学密封件。包括外壳