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Jul 28,2022

How to choose headphones for beginners: why are good headphones so expensive?

I believe that many people buy headphones online. The first thing they care about is not the brand and sound quality of the headphones, but the price on the right, and then exclaim: I go so expensive! Yes, good headphones can be really expensive, and bad headphones are a world of difference. But don't say that good earphones are all deceptive. This time, let's talk about why good earphones are so expensive?

How to choose headphones for beginners: why are good headphones so expensive?

Jan 10,2022

Send you a kit to prevent Bluetooth headsets from being "turned against"

Similar to most wireless technologies, Bluetooth communication is also susceptible to various security threats. Small smart terminals may have security vulnerabilities, Bluetooth headsets may also have, but we do not pay enough attention to it. Yan Huaizhi Director, Institute of Computer Network Countermeasure, Beijing Institute of Technology The Bluetooth headset you wear every day may be tracked by location?

Send you a kit to prevent Bluetooth headsets from being

Nov 12,2021

Open Bluetooth may reveal privacy? Wearable Bluetooth devices hide more risks

Bluetooth headset, Bluetooth bracelet, car Bluetooth... Bluetooth technology since its inception, not only to solve many data transmission problems, but also opened the door to wireless life, get all kinds of smart devices of all ages. But while this technology brings convenience to our lives, it also brings some security risks. According to foreign media reports, researchers from Boston University recently discovered a vulnerability in the Bluetooth communication protocol on Bluetooth devices such as Fitbit smart bracelets, which can lead to the theft of sensitive personal information and allow third parties to track the location of the device. These data are likely to be used by "interested people". Considering the high penetration rate of Bluetooth products, experts suggest that users should be vigilant in this regard.

Open Bluetooth may reveal privacy? Wearable Bluetooth devices hide more risks

Nov 12,2021

Wearable Bluetooth devices hide more risks

According to statistics, there are billions of smart devices around the world using Bluetooth technology. Although Wi-Fi can replace Bluetooth to meet the user's wireless transmission needs, but in wireless headphones, speakers and other devices, usually equipped with Bluetooth and Wi-Fi functions. "Wireless speakers, in-car infotainment systems, these Bluetooth-enabled devices usually only involve point-to-point single-wire transmission and almost no other devices, so they are less likely to reveal privacy. For example, wireless headphones usually only connect to the user's own mobile phone or other personal device, not to the device of others." Huang Xinyi said, but smart wearable devices with Bluetooth function related to sports and health, such as smart bracelets, smart glasses, smart sports shoes, etc., will upload personal information such as heart rate, sleep and body fat of users to the server through mobile phone software, that is, non-personal user devices, which will have a greater risk of privacy disclosure.

Wearable Bluetooth devices hide more risks

Nov 12,2021

China has not yet issued a special safety standards

It is estimated that by 2022, the number of Bluetooth-enabled devices will increase from 4.2 billion to 5.2 billion, and related security issues will become increasingly serious. However, researchers at Boston University also said that windows 10 system and iOS system users only need to turn off Bluetooth and turn it back on again to set a new Bluetooth address. "Before manufacturers fix this vulnerability, this'stupid' method may be the most effective for users who pay attention to personal privacy and security." Cai Yunpeng said.

China has not yet issued a special safety standards

Nov 09,2021

Bluetooth 5.3 is coming! Why are wireless headphones still in 4.0?

In 1994, Yi Lixin put forward a plan to study the method of low-power, low-cost wireless communication connection between mobile phones and other accessories, which is what we now know as Bluetooth technology. The first generation of Bluetooth (1.0) technology was released in 1998, with a maximum transmission rate of 723.1Kbit/s and a maximum transmission distance of up to 10 meters. Early versions of Bluetooth 1.0 had many problems, such as multiple vendors pointing out that their products were incompatible with each other and risked privacy breaches. Over time, Bluetooth technology has been developed for 23 years, and the version has been upgraded from 1.0 to 5.3. The Bluetooth Technology Alliance (Bluetooth SIG) officially released the latest Bluetooth core specification version 5.3 on July 13, 2021. Compared with the Bluetooth 5.2, the Bluetooth 5.3 further improves the communication efficiency of the low-power Bluetooth and the wireless coexistence of the Bluetooth device by improving the periodic broadcast, connection update, and channel classification in the low-power Bluetooth. At the same time, the power consumption of the Bluetooth is also reduced. In addition, the Bluetooth 5.3 version also introduces some new features that enhance the security of classic Bluetooth BR/EDR (base rate and enhanced rate). There is a need to add a knowledge point here. Before the release of Bluetooth 4.0, the first three versions of Bluetooth were mainly developed with BR/EDR/HS, which is what we often call classic Bluetooth. LE (Low Power Consumption) was introduced after the 4.0 version.

Bluetooth 5.3 is coming! Why are wireless headphones still in 4.0?
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