OnePlus 3 sometimes makes an audible whirring sound

[Salil]

Hello,
Have a Oneplus 3 phone that just makes a whirring sound all of a sudden even though I am not doing anything with it. The phone I have is close to 5 years old and does this mean that it is approaching it's end of life?

 

[B. Diddy]

Can you figure out where the whirring is coming from? Is it from the speaker, or possibly from the camera module?