The good ones are adjustable and are not triggered by noise but by remote. The idea is to start with a very small level - something that basically triggers a neck muscle and distracts the dog from deep throating a sock.
When I first got one for my dog, it was after about three months of one-on-one training, followed by specific training for us humans on the correct way to use an e-collar.
Fun fact - the vibration is actually more scary/traumatic for your dog because it gives them an external sensation rather than the neck muscle twitch. I accidentally hit vibrate and my dog jumped about a foot in the air (I was mortified).
I’m fully expecting down votes, but for our rescue we really did use the e-collar as a last resort to try and adjust her learned behavior - stuff that is dangerous for her to do (like swallowing socks and hair ties that she’ll steal from on top of desks). She is utterly loved and pampered - she’s got a bed in every room of the house and gets bougie food, plus all the toys she could ever want.
We just wanted her to stop and listen when it’s super important.
Once she finds one, she’s laser focused on getting to it.