The sensing device is a MEMS microphone that outputs a pulse density modulated (PDM) signal. There are chips available to directly interface such a microphone to a USB port, but [Mahesh] found ...

The unit has an on-board MEMS microphone that picks up ambient music ... such as a base for their LED “Mini Mast”, a long RGB array PCB strip. The unit is powered by a 5 V 2 A USB-C connector.

X-FAB to Provide Foundry Services for Akustica's Family of CMOS MEMS Silicon Microphone Chips ERFURT, GERMANY and PITTSBURGH, PA -- May 31, 2006 -- Akustica, Inc., a pioneer in acoustic system-on-chip ...