Principle of recording sticker

The recording function is realized by the built-in microphone and recording module.

A small microphone is integrated in the recording sticker to receive the surrounding sound signals. The microphone converts the received sound signals into corresponding electrical signals, and inputs the electrical signals into the recording module, which will perform analog-to-digital conversion on the electrical signals, and the continuous analog electrical signals will be converted into discrete digital signals. When playing a recording, the recording sticker can output sound through a built-in speaker or by connecting an external device.