On July 31, Hozon Auto released Nezha S, the first mass-produced model on its self-made full-stack “Mountain Sea Platform.” As a grade B+ sports smart coupe, Nezha S enjoys both the stunning a”pearance of sports cars and the smart soul of executive-class cars. Its widely-known surrounding smart cockpit is also equipped with a smart audio system jointly developed by AAC Technologies and Hozon Auto, which is tailor-made from algorithms to hardware and leads the industry in many aspects.
Meng Yiming, the General Manager of the Automotive Acoustics Business of AAC Technologies, said that Nezha S’ vehicle-mounted smart audio system is a joint creation by AAC Technologies and the client. As a company with 30 years of history in acoustic technologies, AAC Technologies is now swiftly spreading its presence in the automotive industry. Multiple automotive acoustics projects are being promoted at the same time, covering traditional automobile manufacturers, emerging automobile manufacturers, and other medium- and high-end auto brands at home and abroad. It will give smart cars an earth-shaking acoustic experience.
720° surround sound and the “3D sound field enhancement” algorithm
Make sound flow in 3D space
Enjoy the ultimate immersive experience
After rigorous and thorough acoustic analysis, AAC Technologies has customized the 720° surround sound system consisting of 7.1.4 channels and 21 speakers, with a maximum output power of 1216W. The system heightens the sound source with a high-altitude channel formed by installing speakers at high positions to create an effect of sound falling from above. Supported by the “3D sound field enhancement” algorithm, it can fully expand the width, depth, and height of the sound field and make sound flow in the 3D space, thus converting the surround sound from a plane to a 720° three-dimensional space and bringing drivers and passengers a brilliant immersive experience as if they were wrapped up by music.
In addition, AAC Technologies has also customized the sound field reconstruction algorithm for the Nezha S. By analyzing the frequency domain and time domain information of the original stereo sound signal, it can accurately extract audio components suitable for different orientations, different angles and containing different spatial information, and then hand it over to the “sound field reconstruction” algorithm engine for processing and match the multi-channel audio system in the car. In this way, it can restore the 720° sound field supported by main speakers, headrest speakers, and ceiling speakers. This audio system can not only create a three-dimensional sound experience for the audience in the car, but it can also maintain the original high-fidelity sound spectrum and natural feeling. The 720° surround sound experience will not be compromised even when the system is playing music from online resources.
Headrest speakers for the front seats
Create an ultra-near sound area
You are the center wherever you are seated
It is worth mentioning that, in order to better meet the individual hearing needs of passengers, the Nezha S creates an ultra-near sound area for the driver and the co-driver by installing headrest speakers on the main driver’s seat and the co-driver’s seat for the first time, making them the “center of sound wherever they are.”
Front-mounted mega bass for a new sound field layout
More balanced distribution at low frequencies
More stunning sound
Ranging from the optimal coupe proportion to the surrounding smart cockpit, the Nezha S not only provides owners with a control experience comparable to that of a sports car, but also provides passengers with a highly dynamic and cozy in-car space.
As for the bass performance critical for improving the sporty driving experience, the Nezha S applies the layout of anti-vibration woofers set on the front doors and subwoofers set on the rear doors. Front woofers can address the sound attenuation of rear woofers to deliver a more balanced sound field throughout the car, thus placing front passengers in the optimal sound field of solid bass, creating more balanced, intensive, and impactful mega bass throughout the car, and fully embodying the powerful aura of sports coupes.
Technological innovation: revolutionized USS miniature speakers
Break the limit of dimensions
Create ultimate sound fields with unique innovative technologies
The multifarious upgrade of the audio experience on the Nezha S benefits from AAC’s multiple new technologies in speakers. Limited by the dimension, traditional vehicle-mounted speakers are often mounted at a convenient position rather than the acoustically superior position. To solve this problem, AAC Technologies has developed automotive USS miniature speakers to break the physical limit of dimensions with a footprint far smaller than traditional speakers.
Ceiling speakers are essential for realizing 720° surround sound. The 1.9m2 large canopy of the Nezha S occupies most areas of the ceiling and leaves only a small area for speakers. Therefore, the 4 miniature speakers on the side of the ceiling can cope with the challenge of small size. Also, they have innovative features in the high-strength carbon fiber composite paper cone material and the multi-supported ultra-linear structure to maintain the output sound pressure when speakers are smaller. Despite the size, miniatures speakers can also output huge energy and deliver great joy.
Technological innovation: VFW low-profile vibration-canceling bass/subwoofer
Address door resonance and sound leakage
Greatly improve the deep bass performance
In terms of the creation of the bass field, the Nezha S must have better woofers on the front door to realize preposed super bass. However, the body’s resonance makes it difficult for traditional woofers mounted on doors to achieve powerful deep bass performance.
To this end, Nezha S is equipped with VFW low-profile vibration-canceling bass/subwoofers. The non-aligned design of double audio coils can maximize the stroke by taking full advantage of the space, so as to obtain efficiency gain. While addressing door resonance and sound leakage, it can greatly improve the deep bass performance. The refined tuning and signal processing can maximize the sound performance of rear woofers to create a fuller and more stunning bass field.
Thirty years of experience in acoustic innovation
Facilitate perception and connection throughout the world
As a world-leading provider of smart device solutions, AAC Technologies has been committed to the smart device and perception fields centered on acoustics for nearly 30 years. Its products are widely applied in smartphones, smart cars, AR/VR, and other human–machine interaction sectors. It has closely cooperated with world-leading smart terminal developers to facilitate perception and connection throughout the world.
Meng Yiming, the General Manager of the Automotive Acoustics Business of AAC Technologies, said that AAC Technologies and Hozon Auto hit it off in this cooperation. With 30 years of experience in acoustics, AAC Technologies always insists on working with clients to create the best products and solutions rooted in consideration of user experience. “As an industrial partner of Hozon Auto with a vision of ‘making high-quality smart electric cars accessible,’ we write a sonata of acoustic art and auto technologies together,” said Meng Yiming.
As cars are getting smarter, AAC Technologies has been rapidly advancing its automotive acoustics business in recent years covering overall solutions, tunning, and innovative speakers. It has been given multiple designated projects by traditional automobile manufacturers, emerging automobile manufacturers, and other medium- and high-end auto brands at home and abroad. In the future, AAC Technologies will further develop its advantages of innovative technologies, provide clients worldwide with better overall solutions and vertical supply chain guarantees, and better satisfy the growing demands for smart cockpits.