At CES 2020 in Las Vegas, technology company Continental and Sennheiser have presented a speakerless audio system for vehicles.

The creators say that this unique system fills the vehicle interior with lifelike immersive sound. The two partners are integrating Sennheiser’s patented AMBEO 3D audio technology with Continental’s Ac2ated Sound system.

Speakerless Sound

Continental’s innovative concept abandons conventional speaker technology altogether, exciting select surfaces in the vehicle interior to produce sound. Combined with Sennheiser’s AMBEO Mobility, the concept achieves a 3D sound reproduction. In comparison to conventional audio systems, Ac2ated Sound enables a reduction of weight and space of up to 90 percent. In this way, the system not only produces high audio quality but is also perfectly suited for electric vehicles, where saving space and weight is a high priority.

“For Ac2ated Sound we have brought together the highest levels of expertise in the areas of acoustics, infotainment and vehicle design. In Sennheiser we have found an audio expert who helped us make our pioneering audio system even better”, said Helmut Matschi, member of the Executive Board and Head of the business area Vehicle Networking and Information at Continental. “Together, we have developed an audio system that creates premium sound out of nowhere. Additionally, Ac2ated Sound reduces space and weight. At Continental, we call this sustainability that’s music to your ears”.

“We are delighted to bring our audio expertise and AMBEO Mobility software into the pioneering Ac2ated Sound system from Continental, calibrating and fine-tuning the sound quality to deliver a completely immersive and natural sound experience that opens new audio perspectives and realities”, explained Dr. Andreas Sennheiser, co-CEO of Sennheiser.

Co-CEO Daniel Sennheiser added: “Our AMBEO immersive audio solutions deliver the ultimate quality in sound capture, processing and playback. Crucially, the ability to enjoy breathtaking immersive sound does not require specific 3D audio sources – AMBEO Mobility’s spatialisation algorithm can turn any stereo material into an immersive experience. By intelligently analysing the content, the patented algorithm artistically remixes the sound to provide an emotional experience, transporting the listener into the music”.

Transforming The Vehicle Into An Instrument

Inspired by the technology of classical string instruments, which use their wooden body as a resonance chamber, specially developed actuators excite specific surfaces in the vehicle interior. The result is a natural sound experience for the occupants, who feel as if they are sitting in a concert hall surrounded by sound. Additionally, in comparison with conventional speaker systems, the audio solution has a much lower weight and significantly reduced box volume. In comparison: With a multitude of components, conventional audio systems weigh up to 40 kilograms (more than 88 pounds). By using already existing surfaces, Ac2ated Sound is distinctly more efficient in saving space. It achieves a reduction between 75 and 90 percent in contrast to existing conventional systems on the market.

At the same time, the invisible audio technology gives vehicle designers and manufacturers the freedom to do more with an automobile’s interior, as they no longer need to account for large speaker faces taking up valuable space. With Ac2ated Sound, many components are unnecessary because the surfaces in the vehicle vibrate just like speaker diaphragms. Actuators cause components such as the A-pillar trim, door trim, roof lining and rear shelf to vibrate so that they emit sound in different frequency ranges.

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