thank you for your time to read my topic
i'm working on project to record audio I managed to record audio at a sample rate of 16 kHz and a super good 48kHz with STM32F103C8. But the problem is that I have background noise in the recorded sound. and I used different methods
I used a digital power supply
And I used a battery instead of a power supply, but nothing changed
I checked the microphone amplifier with an oscilloscope , great
I use short wire for analog input and low noise standard
Does anyone have experience with ADC noise?