How Acoustic Engineering is Driving the Future of Vehicle Performance
While it may not be the first thing that comes to mind when we think about vehicle performance, breakthroughs in sound and overall acoustic engineering are playing an increasingly important and expansive role in shaping the future of mobility.
Acoustical performance, broadly speaking, has always been an important consideration in automotive design and manufacturing, whether it relates to the sound generated by an engine and subsequent vibrational impact or internal noise cancellation mechanisms and entertainment system quality. But with the rapid shift toward vehicle electrification — and the unique acoustic challenges that come with it — the need for higher performing acoustic components is becoming considerably more urgent.
The optimization of acoustics is particularly critical in the design and production of new EVs, which emit higher frequencies and produce sounds and vibrations that are highly divergent from traditional gas- and diesel-powered engines. Simply put, while the reduction of noise pollution associated with EVs is largely a welcome advancement, it can also pose significant threats to both drivers and pedestrians who aren’t used to the unique sound and vibration profiles of electric motors.
To address these challenges, manufacturers are focusing on building EVs that simulate the noise and vibrations of traditional internal combustion engines. They aim to do this without the abrasiveness that can negatively impact the driving experience and environment. This is achieved through advanced technological processes like Finite Element modeling and noise, vibration, and harshness (NVH) analysis. These tools allow engineers to simulate, predict, and optimize the acoustic output of components early in the EV design process.
Simulation-driven design and artificial intelligence are powerful tools in manufacturing. However, they cannot replace deep expertise in gear design and powertrain manufacturing. This expertise is crucial not only for EVs but also for internal combustion engines and hybrid-drive transmissions. Magna is developing acoustic enhancements that can be applied in a variety of vehicles. Our approach combines simulated NVH engineering with precision gear design and flexible power flow decoupling. We also use scalable electric transmission builds to reduce noise levels. This optimization occurs across all components and considers the vehicle as a whole, rather than relying on isolated solutions.
Put simply, acoustic engineering today is less about reducing sound or creating a single ideal environment, and more about using system-level expertise and innovation to deliver a growing range of personalized driving experiences.
For example, one driver might find the vibrations felt when accelerating around a sharp corner to be thrilling and essential to the driving experience, while another might find it uncomfortable and distracting. Similarly, a driver might consider a balance between external and internal noise to be critical to their safety and awareness while operating a vehicle, whereas another might prefer the cabin to be optimized, within regulatory parameters, for factors like noise cancellation and speaker quality.
Creating the perfect auditory environment for today's consumers is complex. It requires innovative, hands-on work from designers and engineers throughout the design and manufacturing lifecycles.
Whether the goal is to improve EV performance, safety, and practicality for mass adoption or to update traditional vehicles with new technology, acoustic engineering plays a crucial role. This often-overlooked field is essential for driving current and future breakthroughs in automotive manufacturing.
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