Block
Unwanted noise is a disturbance to sleep. I have sensitive hearing and have tried many means to block out unwanted noise when I cannot control the environment. From various ear plugs, to earphones. If you are considering earphones, the Westone series conforms the best to the ears and sits flush mostly.
Mask
The most common is the white noise. Having a fan in your bedroom can be the solution. There are also various background noise websites and apps around. For example, SimplyRain.
Noisli acts similarly but has more complex functions that you can also use to relax or be productive.
Aid
Noise can also prepare you for sleep. For example, you can use a 2-hr sleeping music at a Shumann Resonance.
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