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Acoustics

Acoustics

Good vibrations: acoustic technologies in cars

25 Aug 2020
Taken from the August 2020 issue of Physics World, where it appeared under the headline "Good vibrations".

Without mechanical vibrations, a modern car wouldn’t get far down the road – in fact it wouldn’t start. David R Andrews examines the role of sound and ultrasound in fuel injection and parking sensors

fuel injectors
Sound solution Fuel-injection systems, which rely on the vibrations of piezoelectric transducers, enable modern cars to burn fuel cleanly and efficiently. (Courtesy: iStock/Pointimages)
We can’t see them. In fact, we often can’t hear them either. But mechanical vibrations, whether

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David R Andrews is managing director at Cambridge Ultrasonics in Cambridge, UK, e-mail camben@cambridgeultrasonics.com
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