What Makes Cars Whisper-Quiet? Advanced Noise-Reducing Features

• Car Soundproofing Features
• FAQs

Quiet cabins have become a key benchmark of automotive refinement. Auto manufacturers are adopting advanced technologies and engineering to reduce car noise, thereby increasing driving comfort. From insulation materials to active noise control systems, there are multiple car noise-reducing features.

Features That Reduce Noise in Cars

Car soundproofing involves a combination of structural enhancements and smart acoustic technologies. These solutions reduce different types of noise to ensure a more refined driving experience.

Aerodynamic Design 

Automobile manufacturers are increasingly adopting aerodynamic designs to reduce wind-induced noise. Turbulent airflow, responsible for whistling and rushing sounds at high speed, is mitigated through aerodynamic design. Updates such as sleek exteriors, sculpted contours, underbody panels, flush door handles and wing-shaped mirrors are used to streamline air movement, actively reducing noise. 

For comparison, the modern aerodynamic cars like Tesla Model S boast a drag coefficient of 0.208. In contrast, traditional boxy SUVs or trucks have a coefficient of 0.50, resulting in noticeably higher wind resistance and cabin noise.

The aerodynamics of a car play a major role in making it quieter

Sound-absorbing Materials and Insulation

Modern vehicles are equipped with multiple layers of sound-absorbing materials that are strategically placed across the vehicle. 

Acoustic foams, multi-layer insulation mats and specially engineered carpets are strategically used throughout the vehicle. These materials are integrated into doors, floors and engine compartments to reduce vibrations and suppress engine, tyre and road noise. 

Laminated Glass

The laminated glass is another car noise-reducing feature that offers up to twice the sound insulation compared to conventional glass. It comprises two layers of glass bonded with an acoustic plastic interlayer that dampens vibrations and blocks external noise. 

High-end vehicles like the latest Mercedes-Maybach S-Class and Audi A8 use laminated glass on all windows, ensuring exceptional acoustic comfort for occupants.

Laminated glass has an insulating layer that reduces car noise

Acoustic Tyre Technology 

To make a tyre acoustic, an insulating foam layer is added inside its cavity. This layer reduces air resonance, which typically amplifies road noise and vibrations. Technologies such as Michelin Acoustic and Goodyear SoundComfort use this approach to lower in-cabin tyre noise by up to 20%, enhancing overall driving comfort.

Noise Cancellation Technologies

Modern noise cancellation software uses microphones to detect and channelise external and internal noises, creating a quiet bubble. These systems monitor ambient noise in real time and actively adjust sound levels for specific zones or individual seats, making it a must-have car feature.

One such advanced feature is the Active Noise Cancellation, which detects low-frequency noises and emits precisely inverted sound waves from the speakers, effectively cancelling these disturbances. The feature is available in a number of used and new cars for sale in the UAE. 

Engine and Exhaust Tuning

Exhaust and engine sound are reduced through the use of multi-layer engine covers, vibration-damping mounts and acoustically engineered exhaust systems. These tuned components significantly lower noise levels, particularly during engine ignition, acceleration and high-speed driving.

Specially tuned engines and exhaust pipes help in reducing external noise

FAQs

How does acoustic glass make a car quieter?

Acoustic glass uses a special plastic interlayer between glass layers to dampen vibrations and block external noise. This significantly reduces wind, traffic and engine sounds entering the cabin.

Are electric cars quieter than petrol cars?

Yes, electric cars are quieter due to the absence of an internal combustion engine and fewer moving parts. 

Can car suspension systems reduce noise?

Yes, advanced suspension systems help absorb road vibrations and minimise noise transmission to the cabin, enhancing overall ride comfort.

This is all about car noise-reducing features, their functions and significance. These noise-reducing features highlight the engineering precision behind modern quiet vehicles. As silent driving becomes a hallmark of modern luxury, both new and used luxury cars for sale in the UAE increasingly come equipped with advanced acoustic technologies. From improved drivability to enhanced ride comfort, these innovations play a crucial role in elevating the overall driving experience. 

Stay connected with dubizzle’s auto blog to learn more about engine sound dampening.