Recently, OPPO Enco X, the flagship product of OPPO Acoustics, was officially released. Billed as "Acoustic Flagship, Hear Inspiration", these headphones use their joint Dana-tuned sound unit to deliver Hifi-quality sound and support a full-scene noise cancellation experience of up to 35dB.
The photo is from OPPO website
At the same time, in terms of noise reduction, OPPO Enco X adopts the three-microphone noise reduction scheme of Sonplus Technology, a technology company in the field of intelligent hearing. Each headset has three built-in high-sensitivity microphones, which can effectively reduce the noise of the call and make the voice heard by the other party more clear and pure. It comprehensively improves the use experience of TWS headphones and creates a new benchmark of true wireless noise cancelling headphones.
Three microphone call noise cancellation - anytime, anywhere, quiet talk
SVE3100P three-microphone call noise reduction algorithm, multiplexing ANC feedback microphone combined with dual microphone array to realize adaptive environmental noise elimination. The external dual microphone array locates the user's voice in real time and the interference of the external environment, while the internal microphone collects the user's voice transmitted by the bone conduction path, avoiding the impact of wind noise and noisy environment.
The photo is from OPPO website
In addition, the sound Plus technology developed a more sophisticated adaptive filter on the basis of the original three-microphone calling algorithm, so as to provide broadband enhanced speech signal in noisy environment, while greatly eliminating residual high-frequency noise, improve the timbre of users' speech. The update also adds a more advanced wind noise detection mechanism to provide consistent quality calls from light winds to high winds.
During a call, the sound of the speaker in the headset can affect the voice picked up by the internal microphone. The sound plus SVE solution can eliminate echoes up to 70 decibels (about 3,100 times the range). So that users can anytime, anywhere, quiet chat.
Comparison before and after SVE opening (18KM/H wind speed) :
Comparison before and after SVE is started (actual subway recording) :
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Clearer, more comfortable, more free: multiple core technologies precise noise suppression multi-scene use without fear of interference
The company's Soundplus Voice Enhancement (SVE) AI noise reduction technology works with earbuds, semi-in-ear headphones, in-ear headphones, headsets, and hanging headphones, using a microphone array to precisely calculate where a speaker is speaking, While protecting the target voice in the main direction, it removes all kinds of interference noise in the environment, such as other people's voice, traffic noise, wind noise, etc., effectively suppressing 90% reverse environmental noise, thus reducing environmental noise up to 30dB, ensuring high-quality communication effect. Let the user no matter what kind of noisy environment, can whisper, without fear of interference. Its core technologies include:
Local command: Uses deep neural network to extract speech features, supports accurate recognition of multiple command words/wakewords, consumes very little resources, and can be applied to wearable intelligent devices such as headphones, wristbands and watches.
Echo cancellation AEC:
Use echo cancellation technology to eliminate horn signals leaking into the microphone (widely used in earplug/semi-in-ear TWS headphones).
Directional pickup:
While protecting the target speech in the main direction, all kinds of interference noises in the environment are removed, such as other people's voice, traffic noise and wind noise.
ANC Environmental Adaptation:
The low power Always-On environment detection algorithm is used to maintain the best ANC effect in different noise environments. Adjust active noise reduction parameters for outdoor wind and noise scenarios to ensure noise reduction performance in outdoor wind and noise environments.
Virtual stereo:
Through a pair of headphones, you can enjoy the sound produced by a stereo system consisting of two speakers. It accurately recreates the listening experience of a properly positioned and tuned stereo speaker system, and eliminates the "auditory fatigue" common to headphone appreciation (widely used in gaming headsets).
Voice Pick-Up(VPU)Sensor:
By combining the bone conduction signal detected by VPU with the air conduction signal detected by microphone, high quality speech signal can be extracted in strong noise environment.
Bone voice print ID detection (G-Sensor) : The G-Sensor is used to detect the vibration (bone conduction) signal generated when the wearer is speaking, and combined with the keyword/command word detection technology, the low-power wake-up of TWS headset and the command word detection of specific speakers can be realized.
Feedback Mic (FB mic) : Feedback Mic (FB Mic) :
The ANC's feedback microphone is used to collect the high signal-to-noise ratio speech signal in the ear canal. After echo cancellation, it combines with the air conduction signal detected by the microphone to extract the high-quality speech signal in the environment of strong noise and strong wind.
Full-scene solution: More than 10 million terminals of many star products have been authorized by Fueng Dachang
Founded in January 2018, Song-Plus Technology focuses on the core technology of communication acoustics. It has passed the Zhongguancun High-tech Enterprise certification and Beijing High-tech Enterprise certification, providing B-terminal customers with near field, middle field and far field voice interaction technology solutions in complex scenes, as well as one-stop product solutions from chip, module, PCBA to industrial design. The team is a mix of research leaders and professional managers with extensive experience in the industrial and audio sectors. The main R&D personnel are from the Institute of Acoustics of Chinese Academy of Sciences, Tsinghua University, Nanjing University, University of Science and Technology of China and other domestic first-class research institutes. Most of the core team members were trained by the Institute of Acoustics of the Chinese Academy of Sciences, with an average of more than 15 years of working experience in the industry.
With more than 10 years of technical accumulation in the field of acoustics and speech, its core technologies such as echo cancellation, noise suppression, sound source localization, reverberation elimination, beamforming and voice awakening are well received in the industry and have been verified by the market. The partners include dozens of well-known enterprises such as Huawei, Xiaomi, OPPO, Wanmo, Goer, Sogou, Cobos, Harman, Anker, Hengxuan, Kone, Antecin, Konaixin, etc. In addition to OPPO Enco X, Sonplus has previously supported communication products and smart wearable products including Huawei and Honor TWS earphones, Xiaomi TWS earphones, OPPO TWS earphones with a number of cutting-edge technologies and competitive solutions in the industry, and has authorized more than 10 million terminal devices.
Finally, Sonplus Technology said that as a leader and innovator of intelligent hearing, it is committed to integrating ENC call noise reduction, ANC active noise reduction, sound algorithm and other technologies in complex scenes, so as to provide clearer, more comfortable and freer experience for human communication and human-machine interaction, and finally realize the vision of complete integration of human and machine.
