Yes, electric coffee grinders make a lot of noise. First you have to consider they use a powerful motor, and then the grinding is quite noisy, too.
The good news is that this noise only happens in bursts and not for a long time. Which is the saving grace of electric grinders: they are so noisy, but only bother you for 5-10 seconds at a time, and that’s it.
Manual grinders are less noisy because there is no motor. So less noise - but grinding any coffee still makes noise. Instead of 10 seconds, you’ll be at it for a few minutes but it won’t wake anyone out of sleep like a powerful electric grinder can.