Car driving down the road

Saflex Evoca EAS 
enhanced acoustic 

Better acoustics for improved cabin experience and connectivity

Clearer voice commands. Quieter rides. Lighter glass. 

Vehicles are getting more connected and more electric with an increasing focus on weight savings and drive range — reshaping what comfort and performance mean inside the cabin. As EVs grow quieter, wind and road noise become more pronounced, making it harder for voice commands to be heard and understood. 

With Evoca EAS enhanced acoustic PVB interlayers, windshields and sidelites can reduce cabin noise that interferes with voice‑recognition. It helps improve voice recognition accuracy by 3%–5% (articulation index vs. Q series) while enabling lighter, thinner glazing for a quieter, more comfortable cabin and improved driving efficiency. 

Acoustics play an important role in the vehicle cabin experience

Made with a unique formulation technology

Eastman has leveraged its patented resin and plasticizer technology platforms to formulate a unique viscoelastic core layer. This technology allows the glass-interlayer system to effectively dissipate noise vibrations while maintaining the safety benefits expected from laminated glass.  

It improves overall acoustic performance in the critical wind‑noise region and at high frequencies, creating a more balanced cabin noise profile and a distinctly quieter interior—an anchor for premium acoustic packages.  

These interlayers are also available in HUD‑compatible (Saflex Horizon Vision and LVID), solar IR‑blocking and color formulations. 

Chart comparing sound transmission loss
Chart showing acoustic portfolio for automotive

Evoca EAS enhanced acoustic PVB benefits and applications

  • Improved acoustic comfort 
    • Reduces transmitted noise by 4.5 dB in the 1,000–5,000 Hz range (important for speech clarity) 
    • Adds ~2 dB reduction in the 5,000–10,000 Hz wind-noise band versus traditional acoustic glazing 
  • Better voice recognition and connectivity 
    • Helps next‑gen voice systems perform more reliably by reducing ambient noise levels that interfere with speech 
  • Lighter glazing options 
    • Allows for thinner glass configurations with minimal compromise to cabin acoustics, helping reduce vehicle weight 
  • UV protection 
    • Blocks >96% of harmful UV radiation for occupant and interior protection 
  • Application use 
    • Windscreen  
    • Sidelites 
    • Sunroof
    • Backlite 

Unlock your vehicle's full potential

From head-up display compatibility to infrared-reflection technology, the Saflex portfolio offers diverse interlayers that elevate your vehicles to next‑gen performance. 

Car with HUD

Saflex Horizon Vision

for enhanced visibility in ADAS systems.

Explore here
Untitled design - Thumbnail_XIR_1760x856

Saflex Evoca XIR.SR

for neutral-colored sunroofs with IRR technology.  

Coming soon

Ready to get started?  

Contact us

Full-vehicle acoustic modeling

Our modeling approach quantifies the relative impact of acoustic interlayers across key glazing positions to reduce interior cabin sound pressure.  

Vehicle acoustic simulation process
Saflex Auto SoundDemo

Saflex Auto SoundDemo

Saflex Auto SoundDemo is an online wind noise simulator that demonstrates the in-vehicle performance of Saflex acoustic PVB interlayers in various configurations, i.e., on the windshield only or on the windshield and side windows.