S-LEC™ Sound Acoustic Film

A trend in automotive glass design is to increase the size of the glass area. This allows more sunlight into the vehicle and provides a more natural environment for passengers. On the other hand, the use of single-pane or ordinary laminated glass in automotive glass can result in the transmission of more noise, such as road noise and wind noise, inside the vehicle. There is a need to reduce noise while maintaining the luxurious interior environment intended by designers.

Automotive laminated glass with S-LEC™ Sound Acoustic Film significantly reduces the transmission of traffic noise, wind noise, and other such noises entering from outside the vehicle. With the spread of EVs and the widespread adoption of panoramic roofs, the need for quietness has increased, and the need for sound insulating glass has grown over the years.
For EVs, S-LEC™ Sound Acoustic Film improves the sound insulation properties of all laminated glass types, including windshields, side door glass, and panorama roofs, resulting in quieter vehicles.
Wind tunnel testing on an actual vehicle has shown that panoramic roofs with Acoustic Film improve sound pressure by up to 3 dB, equivalent to a 3.7% improvement in the speech intelligibility index (AI value), compared to conventional laminated glass. In addition, a significant improvement in quietness was confirmed not only in the front seats but also in the rear seats. Please contact us for details of the test results.