You use "noise" to mean the general sense. You use "noises" when you can define and maybe count them. Different types of noise: bumps, thumps, calls, shouts, clunks...

Examples from Longman Dictionary: noise - a sound, especially one that is loud, unpleasant, or frightening [= sound]: -What's that noise? -Try not to make a noise when you go upstairs. There are some set phrases with 'noises' that can be helpful: (make) encouraging/optimistic etc noises (about something) = to say things which suggest what your opinion or attitude is, without saying it directly: -Both sides were making hopeful noises about the hostages. make (all) the right noises (about something) = to say the things that other people want or expect to hear: -The health minister seems to be making all the right noises. make noises about doing something = to say that you are considering doing something: -He is now making noises about starting his own business. noises off = the sounds, voices etc that come from actors who are not on the stage at the time

Very good question. I never thought about it until now. Noise is actually singular and noises is obviously plural. So here are the common things people say using those words. I hear noise coming from there! I hear noises coming from there! When you use the word 'noise' you are implying you hear a sound from one particular thing (source). Of course, a combination of sounds can be misrepresented as one sound but here you are implying or assuming it is coming from one particular source. If you use noises then you are implying that the sounds you are hearing are from multiple things (multiple sources).