My 2016 MBP exhibits coil whine, but I have never returned it or bothered with it because it’s not loud enough nor does it actually interfere or limit my computer from doing the work I need done. I think people more and more just like to complain about things. Coil whine is a natural phenomenon and is present in desktops and laptop across all manufacturers, it doesn’t mean something is wrong or broken. I understand that some people are sensitive to the sound and that it’s bothersome to them. But In the end, there is nothing physically wrong with your laptop.
https://www.ukgamingcomputers.co.uk/blog/capacitor-squeal-coil-whine-explained/
The culprit 99% of the time is actually coil whine. There is a huge amount of science behind this but in short, you will find in coil in something like a transformer or conductor. The purpose of these transformers/inductors is to smooth out power delivery and filter power irregularity. Time for a simple picture to help explain;
They more often than not work in tandem with capacitors and this is where the terms “capacitor squeal” and “coil whine” tend to get crossed over.
Simply put, the coils vibrate when current passes through them – it’s these minute vibrations that cause the whine. When a different amount of current passes through them they are vibrate at different speeds thus volume and pitch of this noise changes. Ever noticed that hum from a power substation station? It’s the same phenomenon. Every electronic device will suffer from coil whine to varying degrees and it is not an indication that the device is faulty, if anything; it’s an audible way of saying “I’m working”.
https://www.ukgamingcomputers.co.uk/blog/capacitor-squeal-coil-whine-explained/
The culprit 99% of the time is actually coil whine. There is a huge amount of science behind this but in short, you will find in coil in something like a transformer or conductor. The purpose of these transformers/inductors is to smooth out power delivery and filter power irregularity. Time for a simple picture to help explain;
They more often than not work in tandem with capacitors and this is where the terms “capacitor squeal” and “coil whine” tend to get crossed over.
Simply put, the coils vibrate when current passes through them – it’s these minute vibrations that cause the whine. When a different amount of current passes through them they are vibrate at different speeds thus volume and pitch of this noise changes. Ever noticed that hum from a power substation station? It’s the same phenomenon. Every electronic device will suffer from coil whine to varying degrees and it is not an indication that the device is faulty, if anything; it’s an audible way of saying “I’m working”.
