A USB microphone is actually a microphone integrated with a USB sound card. Compared with ordinary microphones, it has built-in speech amplifier and AD modules, and some USB microphones also have a headphone jack for real-time listening.
A USB microphone is an analog signal that enters the microphone, then converts it into a digital signal, and transmits it to the computer via a USB data cable. What we usually call the sampling rate refers to the number of times the microphone records the sound waveform in one second. Generally speaking, the higher the sampling rate, the clearer the vocal fidelity and sound quality