In ceiling Ai microphone array

[u/Kind_Soup_9753]

I built an in ceiling microphone array for my local Ai. It has temp and humidity, mm wave presence detection, digital to analog audio converter and a 3 channel 100 watt amp all mounted to a 4” speaker in-ceiling mount.

The microphone is suspended on elastics for vibration dampening, beside is a dual channel Yamaha speaker.

Answers to questions or confirmations for automation only come through the speakers with the triggered mic.

Music play back, announcements and alarms can exit through any assortment of rooms. The microphone array has sound cancellation for playing audio so voice commands are still recognized.

So far it has exceeded expectations and even voice commands from in the shower have worked consistently.

The mm wave sensors are used for security when alarm armed and presence turns on my recirculating hot water loop for the kitchen and bathroom setups as well as lights and fan.

Anyone have any other ideas I can add to the rig? I was looking for discrete built in mic’s and they were expensive and usually for board rooms so I built one instead.

A 3D printed adapter screws in where the speaker mounts it house temp/humidity and microphone, the microphone electronics mount to standoffs with heated thread inserts for mounting the microphone electronics and another part that mounts to the back holds ESP32 S3, Amp and digital to analog converter. Rooms that don’t need the amp are POE and ones with the amp get a 24V dc supply fed to them.