An acoustic windscreen is a special type of windshield in a car that helps reduce noise from outside. It blocks or absorbs sound waves, making the car's interior quieter. Full definition
A special acoustic windscreen lamination, as used on the larger Range Rovers, further reduces wind noise and also helps to eliminate high - frequency combustion noise. (ausmotive.com)
There has also been attention paid to making the cabin quieter through a variety of measures including a revised door seal structure, a modified intake system for petrol engines, additional damping materials, acoustic windscreen glass, modified tyres and damper tuning. (motoring.com.au)
The A7 isn't the last word in driver involvement, but it's smooth and quiet, thanks in part to Audi's «acoustic windscreen», which has been designed to minimise wind noise. (carbuyer.co.uk)