An "acoustic windshield" refers to a car windshield that is specially designed to reduce noise from outside while driving, making the inside of the car quieter and more comfortable. Full definition
A new acoustic windshield and thicker body panels make for a quiet cabin experience. (driving.ca)
They include a standard acoustic windshield and available front side acoustic glass. (bestride.com)
A smoother, quieter ride is promised in the ’17 GT - R, with active noise cancellation and increased usage of sound - absorbing materials such as acoustic windshield glass playing key roles. (wardsauto.com)