Let's move the dial back to 2014.

This year, the mainstream phones are iPhone 6, Galaxy S5, Xperia Z3 and HTC M8; this year, LuoYongHao just released smartian T1; this year, Liu zuohu also polished the mobile phone with attractive waist for the first time; this year, 3.5mm interface has not been rejected by mobile phone manufacturers.

It took two years to ship the first all wireless headset

Nobody thought at the time that the 3.5 mm interface, which has been in the industry for decades, will be expelled on mobile phones in a few years. With the wind increasing, familiar things are becoming strange in our eyes. It is difficult to say whether the correct direction is to remove this interface now. However, the new design will inevitably bring pain. After all, the user's demand for multimedia will not disappear. When a headset can not be found in a few years, maybe a dirty word will be spitted out in his mouth.

Wireless headset

At that time, a team from Germany seemed to have smelled a different breath. In February 2014, the Bragi team launched a new project on crowdfunding site KickStarter, and the first real all wireless headset, the dash, was born. The Bluetooth headset with two absolute independent chambers has made the wire rod troubled history. No longer need to feel to find the line control, and integrated touch function also makes the operation more intuitive.

Of course, also get rid of the hot summer that kind of wire is soaked by sweat and then stuck to the neck.

But the first crab eating is always accompanied by great risks. The dash, originally scheduled to ship at the end of 2014, encountered layer upon layer resistance in the product definition, and the delivery time also jumped repeatedly. It was only until 2016 that it was officially shipped. Two years of waiting. If it was not for the high expectations of this kind of products, I'm afraid the yellow flower dishes are cool.

But after that, the all wireless headset is like a spring up, and it's all over the place.

As we can see now, since Bragi, there are Apple's airbods, Sony's noise reduction beans, Bose's soundsport free, b&o's beoplay E8, and then Jebel Blanc, JBL, pioneer, New Ke and even Meizu and go out to ask. Now there are dozens of similar products on the market, maybe hundreds.

After a large number of products are on the market, the all wireless headset seems to be a popular one. On the one hand, the mobile phone brand is accelerating the elimination of 3.5mm interface, on the other hand, audio manufacturers also speed up the harvesting of users. But there are also doubts that the biggest concern for all wireless headphones is how stable and delayed the connection is, and this is what they feel after they take the product.

The biggest problems are connection stability and latency

For invisible things, people often feel suspicious from the heart. From the perspective of consumers, the cable is always more stable than wireless. But they still have a high expectation of the development of modern science and technology. It is only very quickly that cold water splashes on their heads: the early situation of the left and right ear disconnection of all wireless headphones is serious.

Because of the point-to-point scheme of Bluetooth A2DP protocol, one audio stream cannot be distributed to two earplugs at the same time, so there is a connecting line between the left and right ears of traditional Bluetooth headset. The solution is to synchronize the data of the left and right ear cavities by wireless connection. There are two commonly used technologies.