Without the 3.5mm headphone jack, why can’t Type-C headphones become popular?

Since the iPhone 7 cancelled the 3.5mm headphone jack in 2016, more and more manufacturers have begun to follow up this design, leaving only the Type-C interface (the iPhone only has the Lightning interface).

At that time, this change caused great concern and discussion among mobile phone users, and many users expressed dissatisfaction with the cancellation of the 3.5mm headphone jack. At the same time, headset products adapted to these interfaces have been gradually introduced. In addition to the Lightning interface headset that comes with the iPhone, the Type-C interface headset has also attracted a certain amount of attention. However, the former is said to no longer be used as a new generation iPhone accessory, while the latter has long been silent in the long river of history. So, what makes these two headset solutions that can directly connect to mobile phones gradually disappear?

What is the reason for canceling the 3.5mm headphone jack?

At that time, many people “blame” part of the reason for “selling their own adapters and wireless headsets.” After all, at the same time as the launch of the iPhone 7, Apple also launched its first-generation “true” wireless Bluetooth headset AirPods.

▲ News analysis at the time

But in fact, this “blame” is still wrong with Apple, because Apple will give away adapters and Lightning interfaces in subsequent models (starting with iPhone X only adapters), which not only solves the problem of listening to music, but also by the way The adapters of users who “do not want to change to a new headset with a 3.5mm interface” mentioned in the picture are fitted.

Therefore, these two are not the main reasons to cancel the 3.5mm headphone jack.

▲Package content list of iPhone8

Speaking of this, many small partners may have a big question mark in their hearts: In this case, why do mobile phone manufacturers cancel the 3.5mm headphone jack?

To clarify this question, we must answer it from two aspects.

The first aspect is to save space inside the phone. According to the disassembly report of iFixit, the space contributed by the iPhone after the removal of the 3.5mm headphone jack is mainly left to the Taptic Engine.

▲ Taptic Engine on iPhone6s Plus

This Taptic Engine is actually the new linear motor first adopted on the iPhone 6S. The biggest difference between this linear motor and the linear motor used in previous models is that it has better touch feedback. For example: iPhone 6S has an additional default vibration option called “Sync” in the settings. When it is turned on, it can generate a vibration rhythm that is almost synchronized with the ringtone.

In iPhone 7 and later models, this motor has a larger volume to provide better touch feedback, such as different feedback from the home button (ie, Home button).

▲ Schematic diagram of the Taptic Engine of iPhone7

Of course, some of the space left by the removal of the 3.5mm headphone jack is also provided for other accessories, but it is mainly to make way for the Taptic Engine.

Not only the iPhone uses this space to make a big story, other mobile phone manufacturers are of course unwilling to abandon this rich space. For example, the CEO of Razer once stated that if the 3.5mm headphone jack is cancelled, Razer mobile phones (although in domestic Almost no one has heard of it) You can plug in a 500mAh battery.

On the other hand, the elimination of the 3.5mm headphone jack also makes the continuous evolution of the mobile phone more possible, for example, thinner and lighter.

The phone in the picture above is OPPO R5 launched in 2014. It also cancels the 3.5mm headphone jack, and its thickness is only 4.85mm.

Although the vivo X5Max launched in the same year achieved the limit of 4.75mm while carrying a 3.5mm headphone jack, the size of the former is slightly smaller than the latter, which means that the latter has more horizontal space for use. .

Moreover, it seems that the iPhone is not the initiator of the cancellation of the 3.5mm headphone jack on smartphones.

▲ The real initiator should have been launched in 2011

In addition, the removal of the 3.5mm headphone jack is more convenient for the waterproof design of the mobile phone, and it also makes the symmetrical design of the bottom space of the mobile phone possible. The iPhone 7 takes advantage of this, and uses a symmetrical speaker hole design on iPhone 7 and later models. The lower left is a microphone hole, and the lower right is a speaker hole.

▲ Comparison of the bottom of iPhone 6S and iPhone 7

As for why the iPhone 12 will cancel the included earphones and adapters, it starts with why the Type-C earphones disappeared from our sight.