Check that the taps are the right ones, meant for high or low pressure. If the hot water is tank fed, they might not be suitable for high pressure, and why you're getting the noise on the cold mains.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!