This, of course, a hissing sound. So what’s going on here?
Stephen Hackett at 512 pixels was the first to notice a strange sound coming from his phone, and others immediately confirm that they appear the same question, including Darrell Etherington from TechCrunch.
At the moment, there are several theories about why this happens, but no real answers.
Jon Fingas from Engadget says that “some of the suspect coil whine or similar electromagnetic effects.” He also points out that this is not a universal problem, as he “tested on iPhone 7 using 3DMark” ‘Ice Storm Extreme’ performance test, which puts the processor under serious pressure and heard no hissing at all.”
Author and developer Marco Arment of iOS has a poetic perception:
It’s the phone equivalent of hearing the fans spin up loudly whenever your Mac’s CPU gets used to its actual potential.
— Marco Arment (@marcoarment) September 17, 2016
Apple will now replaces the phone so that it can be an option if you are concerned. Unfortunately, it will also mean that you have to wait 5-7 days for a replacement.
5-7 business days to swap a bad phone out of the box. Good job. https://t.co/2T099NWLl5
— Stephen Hackett (@ismh) September 17, 2016