HW Interview
SD-05 · Chapter 12 · System Design (Open-Ended)

Matching microphones at volume

A product's microphone-array beamforming only works if every unit's microphones stay inside a tight sensitivity window (assume ±1 dB). How do you keep that true in high-volume production, not just on the first prototypes?

Level●●● onsite design / senior
TrackSenior system
Really testingStatistical design and supplier management.
Full worked answer: in the book, page 292 — what to say first, how to explain it, the numbers worth quoting and the follow-ups. About the book →

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