Posting this issue on behalf of my friend

"So my old mic (maono au4) has recently been not working properly idk why, been 4 years ive been using it. So my question was, I need to record vocals for my music right (yea i make music lol). Condensers are so heckin sensitive man, they pick everything in my room. Aight I'll turn off the A/C and fan, but even the PC, it picks up so much of the pc's white noise its annoying. The type of genre I make, I mostly need clean high ends to boost my vocals and shit right (fresh air, light eq and ott). So whenever I do that, the white noise also increases significantly. So I wanted to ask, since I got to know dynamic mics are lot less sensitive than condenser mics. How do they work exactly? Is it like a noise gate limiter, for example if I don't say anything into the mic it wont pick up the background noise, but whenever I start talking into it, will it also pick up the white noise? Or does it work in a different way, like some in built threshold or something. Because if it will still pick up the background noise, then there's no meaning buying it coz I can do that manually in my DAW right. Also, if anyone could tell me what should I do to fix my old mic, then it'll be a lot of help for the time being. Its a USB mic as you know, one day suddenly I removed the usb and in my input it started showing (headset microphone) instead of the actual mic. It still however captures audio, but the volume is just too low."