TWS is the abbreviation of English True Wireless Stereo, which translates into real wireless stereo.
Based on the development of chip and Bluetooth technology, TWS headphones have no traditional physical wires. The left and right headphones form a stereo system through Bluetooth. A mobile phone can be connected to a receiving terminal, and it will distribute the stereo to another receiving terminal through wireless transmission to form a stereo system.
Development of TWS Headphones
2065438+September 2006, Apple released the first generation of AirPods, which opened the wireless era of headphones, and TWS headphones ushered in an unprecedented development opportunity.
In terms of market share, Apple's TWS headphones are in the leading position. According to market research firm Counterpoint Research, in the third quarter of 20 19, Apple's single-quarter market share accounted for 45%, which was significantly ahead of other manufacturers. Counterpoint forecast also shows that the global TWS headset shipments are 201200,000 units, up 160% year-on-year.
After market iteration, TWS headset industry has developed continuously from germination to flowering, and 20 17 experienced a big explosion.
TWS headset manufacturer
In the past year or two, manufacturers of TWS headphones have the following four categories:
The first category is traditional audio manufacturers, represented by Sony; The second category is mobile phone manufacturers, such as Apple, Huawei, Samsung and OPPO. The third category is some Internet giants, such as Google and Microsoft. The fourth category is well-known parts manufacturers, such as the domestic UGREEN Alliance.
In order to meet the needs of users, UGREEN Green, a well-known digital accessory brand in China, has opened up new fields. A TWS headset has been sold in overseas markets, and gained a good sales volume and reputation, laying a good foundation for the upcoming launch of a new TWS headset series in the domestic market.
According to the news, the TWS Bluetooth headset that Lvlian is about to launch for the domestic market focuses on high-quality sound quality, supports Bluetooth version 5.0, and also supports Type-c fast charging function, which has the advantages of long battery life.
For our users, buying TWS headphones not only has more choices, but also faces more complicated choices. Next, we will share the key parameters that should be paid attention to when purchasing TWS headphones.
Audio decoding technology
The following are introduced to you in order of sound quality from low to high:
SBC: General audio format with average sound quality. Now 80% are in this format.
AAC: When Bluetooth supports files in AAC format and mobile phones also support AAC transmission, the sound quality is much better than SBC.
APTX: This is a patented coding algorithm of CSR. Its advantages are high audio quality, low hardware complexity and low equipment requirements. Only a single device can realize 22.5kHz dual-channel stereo.
Aptx-LL: Aptx LL focuses on low latency, and its main feature is that it can achieve latency below 40 ms ..
APTX HD: Focus on high-definition audio, improve the bit rate on the basis of traditional APTX, and the overall sound quality transmission is better.
LDAC: Audio codec developed by Sony, officially released on CES 20 15. It can transmit and stream 96KHz\/24bit music (also known as high-resolution audio) through Bluetooth, and the speed can reach up to 990kbps.
LHDC: The high-definition Bluetooth transmission protocol independently developed by Huawei not only ensures the maximum resolution of wireless audio transmission, but also ensures the high purity of sound quality.
Bluetooth version
The original version of Bluetooth was 1.0 in 0999, and version 2. 1 was released in 20 17, which greatly improved the transmission speed. In 2009, 3.0 high-speed Bluetooth came out, and in 20 10, Bluetooth came out 4. X version, even faster.
Bluetooth version 5.0 was released in 20 16, which is twice as fast as 4. X and 4 times longer than 4.x, it is more intelligent, with the advantages of privacy protection and low power consumption.
Noise reduction technology
At present, the mainstream noise reduction technologies include ANC noise reduction, ENC noise reduction, DSP noise reduction and CVC noise reduction.
ANC noise reduction adopts active noise reduction technology and hardware noise reduction. The principle is that the microphone collects the external environmental noise, and then the system converts it into reverse sound waves and adds them to the speaker, thus reducing the sensory noise.
ENC is an environmental noise reduction technology, which can effectively suppress 90% of the reverse environmental noise, thus reducing the environmental noise by more than 35dB and removing all kinds of interference noise in the environment.
DSP noise reduction is mainly aimed at high and low frequency noise, and the noise reduction principle is similar to ANC noise reduction.
CVC is a noise reduction technology of call software, which mainly aims at the echo generated during the call.
IP index level
The IP index of TWS headphones refers to the protection level of headphones. An excellent TWS headset has a waterproof rating of at least IPX 5. For the specific protective effect of each index, you can take a closer look at the specific content of the picture.