One of the most widespread and oldest, recommendations that exist in the field of electronic devices is the of don’t buy the first runs of the same. Despite multiple quality checks to those who are subjected, sometimes carry small defects arriving tents which are corrected by the responsible in later productions. A recommendation, by the way, very difficult to perform when we are talking about smartphones.
We mentioned in the review of the issue with the Samsung Galaxy Note 7 batteries that few manufacturers can boast of not hoarding any manufacturing problem, and that is precisely what It may be happening now with 7 iPhone. Some users report the appearance of a small hiss when the processor is at maximum operation, and some believe to have found the explanation to the problem.
Some explanations to dispose
With all the problem that exists with the Samsung Galaxy Note 7 there have been those who automatically put the focus on Apple, accusing them of certain errors when building the new iPhone 7 that may have led to this whistle. Some accusations, discarded as they checked some media, the whistle is also heard in previous iPhone models, but with lesser intensity.
That is a problem that has been time in the interior of terminals of Apple discards, firstly, due to the absence of the headset jack. Headroom of this on the iPhone 7 would have been occupied by a greater engine taptico, one of the first designated when looking for explanation of this whistle.
The other explanation, not as disposable, is that is a problem of sealing the terminal itself. A possible exchange of hot air to the outside, hence the emergence of the whistling sound when the A10 processor will operate at maximum power, that would be caused by a leak in the unibody of the iPhone body. Given that we are talking about, for the first time, an iPhone completely waterproof thanks to IP67 certified, should begin to discard this explanation. Although defective devices there are in all families.
Coils, or the coil whine
Among many possible explanations to this ping seems to be random, and not present in all 7 sold so far iPhone, has released one that match several experts in electronics. The whistle could be caused by an iPhone plate coil and it would appear most significantly, being then easier to hear it, with the processor to develop their full potential.
This noise, confirmed that this coil is whine or sound from a coil, would be of electrical origin and it seems, once probed the electronic products market, fairly common. The effect, which in English is known as coil whine (or lament of the coil), is called magnetostriction and as we say, is very common. It seems to occur with some regularity in the most advanced graphics cards for PCs and consoles, but also in other high-performance devices.
The windings are subjected to electric fields and magnetic fields are generated. The forces of that same field can cause the coil to vibrate physically, producing that ping that sometimes it is not so weak as it would be desirable. The increase of the sound can occur, in fact, if own winding resonance frequencies, are used in the terminal as the combination of both makes it to amplify.
As they discuss the most knowledgeable in physics and electronics, the increase in stress on the electronic circuiterias makes these more likely to generate noise, and hence iPhone 7, your processor be subjected to very complex and demanding tasks come to produce this sound that some users are detecting and denouncing.
For now Apple remains silent in respect of this matter with the hiss of its iPhone 7, possibly because they are still in the process of detection and diagnosis, but already cited sources close to the Californian company about a possible replacement free of charge if the customer requests it. This would involve, automatically, the assumption by the company of an error of manufacturing, a defect in some terminals.
Other sources speak of that if finally is a problem with the vibration of the coils, Apple could fix it with a software patch in the future versions of iOS 10, that should not take to appear to correct small defects that they find in the operating system. With this patch, Apple could decrease the maximum for your processor and avoid stress to their devices, reducing or eliminating the hiss.
ToCA wait because the manufacturer still has not ruled on the matter and complaints, for the moment, are quite isolated. But in these cases only does need to appear in the media so that all users begin to perceive the whistle and demand its return. We’ll see how Apple saves this claim that has hands. For your security, do not fear, the electronics sound. We have already seen it.