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Sound Capture by Microphone Vibration inside Playback Devices

Integration of voice capture into devices that formerly were used only as a sound source, or that now need to include the ability to interface with a variety of cloud-provided services available to users and/or expand voice control capability to otherwise simple devices has become commonplace, and integration of multiple microphones inside a case that houses playback transducers requires careful attention to certain design aspects as will be discussed in this article where a prototype of a "Smart Speaker" will be used as an example.

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AES - Audio Engineering Society