While that helps to cut down noise on its own, acoustic glass has an extra layer of noise-reducing vinyl. All windshields are made of two pieces of glass with vinyl sandwiched in between, to keep it together if it breaks. Acoustic glass can be used in the windshield and side windows.
There are numerous ways to quiet a vehicle’s cabin, beyond just adding sound-deadening material. Article content Other noise-cancelling methods This advertisement has not loaded yet, but your article continues below. The peak-and-valley air pressure waves of the ANC sound, 180 degrees opposite to the high and low waves from the engine or road noise, essentially combine both sets of waves into an almost flat line, and very little – if any – of the unwanted noise reaches the occupants’ ears. Known as “destructive interference,” it’s virtually imperceptible to the occupants, but it’s enough to cancel out the problem. Ford designed the Shelby GT500’s stereo to help the engine sound perfect.How It Works: Noise, vibration and harshness (NVH) engineering.It issues it as a sound out of the stereo speakers, whether the stereo’s on or not. Then, for each wave of unwanted noise, it comes up with a wave that’s completely the opposite. Microphones in the vehicle’s cabin pick up sounds and relay them to the system’s computer, which determines the sound waves. The technology works on the same principle as noise-cancelling headphones. This is in addition to the sounds created in all vehicles, including road noise from tires and suspension vibration, and wind noise.
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