Believe it or not, vibrating noises are actually fairly common in plumbing lines, especially old ones. If a valve or washer in a faucet is loose, it will be easily rattled by the flow of water and you will hear that noise. If you open and close your faucet very fast and hear a noise, it means you have loose pipes. You can correct that giving them a more secure anchoring. You can also call Narwhal Plumbing to provide more technical and permanent solutions to the problem, such as adding air chambers at the end of long pipes.