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Noise Control

Traditional Approaches and Their Limitations

For decades, 3D noise control has primarily relied on physical barriers, foam-based liners, and butyl-based dampening materials—like Siless liners—to block or absorb unwanted sound. While these solutions perform adequately at higher frequencies, they often fall short below 1 kHz. They also tend to be bulky, add unnecessary weight, and depend on petrochemical or other non-renewable resources.

Meanwhile, modern Active Noise Cancellation (ANC) technologies excel at managing noise in specific zones but become difficult and costly to scale in larger, more complex environments. Clearly, the market demands a more efficient, lightweight, and flexible alternative—one that delivers superior low-frequency performance without sacrificing sustainability.

Siless Liner Sound Insulation
Butyl Sound Dampening for Automotive
Movement of the plasmacoustic metalayer under modulating control voltage

Introducing the Plasmacoustic Metalayer

Our patented Plasmacoustic Metalayer brings a new level of innovation to noise control by using a plasma-based approach that actively adjusts acoustic impedance. A controlled corona discharge creates an ionized gas layer—functioning as a “mass-free” diaphragm that reacts instantly to incoming sound. When configured for active absorption, the system continuously senses the noise environment, processes the data in real time, and fine-tunes the plasma layer to counter unwanted sound energy. By dynamically modulating its impedance, the Metalayer efficiently dissipates noise—particularly low-frequency sounds—achieving precise, adaptable performance far beyond traditional methods.

Response of disabled Plasmapanel to an incident sound wave Response of enabled Plasmapanel to the same incident sound wave

A Sustainable Breakthrough

By shifting away from reliance on heavy mechanical materials and petrochemical-based products, the Plasmacoustic Metalayer offers a cleaner, more environmentally responsible path forward. Its ultra-lightweight design dramatically reduces material usage, weight, and overall carbon footprint, while the plasma layer’s rapid responsiveness ensures class-leading performance.

This groundbreaking synergy of high efficiency and minimal environmental impact sets a new global standard in noise control—delivering advanced, sustainable solutions without compromising performance. From automotive and aerospace to consumer electronics and beyond, the Plasmacoustic Metalayer empowers organizations to meet stringent acoustic demands responsibly.

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About us

Sonexos is a Swiss engineering company specializing in high-performance audio and sound control. We develop and supply advanced solutions for audio enhancement, noise and vibration control to clients in the consumer, transportation, automotive and industrial sectors.

A core innovation is our Plasmapanel technology—an active acoustic solution that achieves broadband sound absorption in enclosed spaces such as vehicle cabins, rooms, offices, ducts, and machinery. Unlike passive treatments that rely on mass or porous materials, Plasmapanel actively absorbs the energy of incident sound waves upon contact, delivering lighter, more space-efficient noise reduction across a wide frequency range.

 

Beyond our R&D capabilities, Sonexos provides strategic advisory services to help clients accelerate innovation in sound and acoustics. Our offerings include product design consultation, acoustic benchmarking, system integration support, and scalable manufacturing guidance—ensuring successful deployment of advanced technologies and long-term differentiation in the marketplace.

By combining deep technical expertise with a pragmatic, system-level approach, Sonexos empowers companies to elevate acoustic performance where it matters most – where sound enhances experience.