Reference: Course 3 (Deploying TinyML), Testing the Sensors.
Hardware: TinyML Kit
Software: tinyMLx - Built-in Microphone Test (from Examples → Harvard_TinyMLx)
Serial plotter seems to be hearing a lot of noise. Quite room with microphone on and seeing two lines that are quite erratic. When I introduce proper sound then I receive a sine wave. Is this normal. I was expecting a flat line or nothing in quite room without sound.