Macbook Pro 2016 high pitch noise issue


i have macbook pro w touch bar 2016 15 inch 2.7ghz 16 gb ram

it's been 3 weeks , computer making high pitched "zzz" noise comes right side of device near right speaker. have been using computer 7 months , never heard noise before. noise quiet, requires quiet room hear it.

sound consistent long computer on. faint sound in right corner near delete button. compared brother's macbook pro has same model , computer not making sounds mine.

sent apple repair , couldn't find anything. said computer passed tests , on. needless mention computer works perfectly.

however, sound still there , bothers me lot because didn't hear noise before , might serious problem in future.

have same problem? or be?

thank in advance
 

those high pitch noises may 1 or both of fans is/are not spinning. happens me @ random. since have mbp 2011, open bottom case , clean myself.
 


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