Shulou(Shulou.com)11/24 Report--

On July 27, Huawei unveiled the brand-new FreeBuds Pro 2 at the HarmonyOS 3 and the full scene new product launch, which brings you a pure and wonderful listening feeling with the ultra-perceptual original dual-unit system, joint tuning with Divare, HWA and Hi-Res Audio Wireless double gold standard certification and other strong features.

The release of Huawei FreeBuds Pro 2 not only shows the industry the great potential of real wireless headphones in sound quality, but also realizes the revolution of digital acoustics on its own.

So, how did Huawei FreeBuds Pro 2's good voice advantage come from? Huawei FreeBuds Pro 2 can lead in all aspects of acoustics, and what technologies are behind it? On August 18, the Shanghai Audio Research and Development Center, the largest laboratory in Huawei's audio field, opened to the media for the first time. At this event, the "good voice" of Huawei audio was displayed in an all-round way visible to the naked eye.

The largest laboratory in the audio field of Huawei can "see" the flight trajectory of birds and hear the "heartbeat". The construction of Huawei Shanghai Audio Research and Development Center was completed at the end of 2019. As Huawei's largest audio laboratory so far, a major background for the construction of Huawei Shanghai audio laboratory is that Huawei has keenly discovered the increasing urgent demand of consumers for good sound, as well as the development trend of the audio industry in the future. If you want to achieve a huge lead in the audio field, strong R & D capability is the most critical link.

It is understood that the total area of Huawei Shanghai Audio Laboratory is more than 2000 square meters, which is equipped with the industry's first headphone active noise reduction objective evaluation system and headphone sound quality objective evaluation system. Huawei's first objective evaluation standard: HUAWEI SOUND standard is even developed based on psychoacoustics, which further improves Huawei's audio product R & D innovation ability and audio experience.

Huawei Shanghai Audio Lab covers seven areas, including vehicle scene Lab, headphone talk Lab, Space Audio Lab, headset noise reduction Lab, Indoor scene Lab, hardware Innovation Lab and Audio experience Research Lab.

Take the space audio laboratory, which costs as much as millions of RMB, as an example, which is equipped with seven speakers, one subwoofer and four "sky speakers", each of which is placed in strict accordance with ITU international standards. This loudspeaker system can present a broad sound field and create a standard three-dimensional sound surround environment, so as to simulate and restore real life scenes, including music, movies, audio books and so on. For example, when the sound of birds hovering in the air is played, people close their eyes and feel as if they are shuttling outside to see birds flying in the sky in the forest, and to "see" the flight tracks of birds with their hearing, completely restoring the most authentic spatial sound effects.

For example, the headset talk lab, as a full-noise laboratory designed by sharp split, can restore users' real-life noise scenes and repeatedly debug the quiet call ability of headphones. It should be emphasized that the only background noise in this laboratory is 9dBA. You know, 20dBA is already the limit of human hearing, so you can even hear your own heartbeat here. In addition, there are eight loudspeakers and one subwoofer in the laboratory. This whole set of loudspeaker system ensures the reduction of the sound field and can restore the real person to talk in different environments to the maximum extent, including quiet, noisy, high-noise, multi-person speaking and other scenes.

The headphone noise reduction laboratory is also a full noise reduction laboratory, where extremely stringent test environment standards and test systems have contributed to the active noise reduction technology cool techs of Huawei's intelligent noise reduction system, where the newly released intelligent dynamic noise reduction of Huawei FreeBuds Pro 2 is debugged.

In addition, there is an indoor scene laboratory for the real restoration of the living environment, which is used for testing the music playback effect of products such as flat panel, PC, large screen, audio, home theater and other products in various living environments; and the car laboratory which is isolated from the ground and sound insulation; the experience research laboratory for user experience, the hardware innovation laboratory, and so on.

Scientific and rigorous testing system and hardware have achieved a first-class acoustic construction environment in the industry, which also provides a strong technical guarantee for the innovation of Huawei audio equipment. In fact, since joining the audio technology research and development track in 2018, Huawei has been committed to innovative research and development in the field of acoustics. in addition to Huawei Shanghai Audio R & D Center, it also has six major R & D centers in the world. more than 500 + acoustic engineers. It is precisely based on the above strong technical strength background, Huawei in only four years, dozens of audio products, continue to achieve Huawei's leading position in the audio field, but also in the field of TWS by leaps and bounds, such as industry-leading intelligent dynamic noise reduction technology, semi-open active noise reduction technology has opened up a new noise reduction experience.

Huawei FreeBuds Pro 2, defined by innovation, according to IDC data, global TWS headphone sales reached 310 million units last year, a year-on-year growth rate of 33%. In fact, TWS true wireless headphones have become the core theme of headphone market development. However, even in the face of the huge potential of the TWS track, the major manufacturers' innovation and achievements in the field of TWS sound quality are still unable to meet the needs of consumers. For example, "sound quality can only listen to a sound" has become a mantra for many people to make fun of real wireless headphones, and behind it is consumers' helplessness and compromise on the sound quality of TWS products.

For Huawei, this is both a challenge and an opportunity. Under the support of strong R & D strength, Huawei has brought high-quality audio products to consumers again and again. Take TWS headphones as an example. In the FreeBuds Pro released as early as 2020, Huawei made drastic innovations for acoustic devices and architecture, such as the use of self-developed dual-core magnetic circuit design and supermagnetic steady-state moving coil, which has a wider range of amplitude space and surging power. It even adds a special fixed core support for high-fidelity sound from Hi-fi audio to reduce the occurrence of sound quality distortion.

As the second generation product of FreeBuds Pro, Huawei FreeBuds Pro 2 has once again made a bold innovation in acoustics, introducing a super-perceptual original sound dual-unit system. In terms of acoustic architecture, Huawei FreeBuds Pro 2 uses two independent high and bass sound units and a digital frequency division scheme. The 11mm large moving coil unit uses a quadruple magnet double magnetic circuit system, which has a larger magnetic flux and a greater driving force for the diaphragm, which is 30% higher than that of the previous generation. In the design of the tweeter, Huawei FreeBuds Pro 2 uses a micro-flat tweeter used for high-end headphones, and its voice coil driving area accounts for a proportion of the total area of the diaphragm, which is 6 times higher than that of the previous generation of products. with the independent sound channel of the tweeter, you can hear the rich details of the rise and fall of the music.

In addition, Huawei FreeBuds Pro 2 also has digital dual frequency division technology, which uses built-in dual DAC to "split the music signal into two channels", bringing high frequency, medium and low frequency pure sound signals, moving coil unit and micro-flat treble unit do not interfere with each other, because of this, Huawei FreeBuds Pro 2 can perform well in low, medium and high frequencies, whether it is listening to dynamic DJ or classical concerts.

At the algorithm level, Huawei FreeBuds Pro 2 optimizes ear canal adaptation, wear adaptive compensation and volume adaptation to achieve triple real-time hearing optimization, so that the sound quality can be kept at its best under different users, different scenes and different volume. Huawei FreeBuds Pro 2 also has some "hard power", such as the use of LDAC and L2HC dual HD audio codec protocol, audio transmission rate of up to 990kbps, to achieve ultra-high-definition listening experience. At the same time, it has also obtained HWA and Hi-Res double gold standard certification in terms of acoustic performance, which is equivalent to laying the foundation for the sound quality strength of Huawei FreeBuds Pro 2.

In order to achieve the top sound quality, Huawei FreeBuds Pro 2 is tuned in conjunction with Divare. As an old friend of Huawei, Divare, together with Huawei, has carefully tuned the innovative acoustic design of Huawei FreeBuds Pro 2. For example, in the middle and low frequency tuning, they make the transition from the low frequency to the intermediate frequency more smooth, while keeping the elasticity and diving of the low frequency, they also ensure that the low frequency does not cover the fundamental frequency of the human voice, while in the intermediate frequency tuning, the reality and clarity of the human voice are further improved in the 4kHz~9kHz band, while the ultra-high frequency part takes into account the sense of hearing at the cutoff frequency point of the human ear, which is slightly suppressed. Overall, Jean Divare's joint tuning gives Huawei FreeBuds Pro 2 a surging bass, rich in detail and pure sound.

Written in the end: the training of a good voice is not built in a day. It is Huawei's innovation and technical investment in the audio field that has finally achieved the landing of excellent products such as Huawei FreeBuds Pro 2.

Huawei has used practical technological innovation to improve the sound quality of real wireless headset products, and it also makes us clearly realize that if we want to break the tradition of "real wireless headphones listen to sound", it is not the formalism of shouting slogans, but the investment that is not willing to give up the cost. It is the long-term doctrine of innovation. And now Huawei's leading position in the audio field is the natural fruit of this long-term doctrine. We also have reason to believe that next, Huawei will still bring more amazing products to the entire market.

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