Noise cancellation microphones with shared back volume

Abstract

An audio device, in at least one embodiment, includes a device package and a plurality of microphones. The device package defines a component cavity and a plurality of vias including a first via and a second via. The vias comprise openings in the device package extending between the component cavity and an exterior. The microphones are located within the component cavity. The microphones are configured to generate electrical signals in accordance with acoustic pressure in the respective vias. A disclosed audio apparatus includes an apparatus housing and a speaker and one or more noise cancellation microphones within the frame. The speaker includes a speaker diaphragm configured to vibrate in accordance with an audio signal. The apparatus housing may define a speaker cavity configured to mechanically support the speaker diaphragm. In at least one embodiment, the audio apparatus includes a multi-microphone device including a first transducer corresponding to a first via and a second transducer corresponding to a second via. A first acoustical conduit may extend from a first end in proximity to the first via to a first exterior location and a second acoustical conduit may extend from a second end in proximity to the second via to a second exterior location.