Make sure it isn’t touching anything or maybe even wrap it in a towel , I’ve seen some people do that to make it more quite, I have 3 in my 1 tank and they don’t make too much noise. It’s good to get movement on your water surface but if you turn it off while you sleep I don’t see a problem with that
You don't actually need bubbles in a tank, they are for decoration as long as the water is moved along under the surface by the filter. They are useful for creating more water turbulence in certain circumstances such as during a heatwave or when medicating a tank as both of these reduce the amount of oxygen in water, but apart from those bubbles aren't necessary.
