I have verified the operation of the microcontroller and microphone array and have produced an enclosure.
The enclosure has an additional AAA battery case for drive and a toggle switch for power.
![system image](https://protopedia.net/pic/55144bdc-ce05-43af-bf80-10b0873ef05c.jpg)
I made only one board to connect the wires and secure the microcontroller board.
![](https://cdn.hackaday.io/images/1921651685416722612.jpg)
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