Music to your gears: The art of a car's engine sound
Where's the fun in a silent supercar? Josh Sims extolls the importance of that distinctive, powerful roar
"This is a Maserati," announces a radio advertisement from the Italian sports-car manufacturer. What is conspicuous about this ad, however, is that it gives so few details about the car in question. Rather, it is reduced to just 30 or so seconds of engine sound. This distinctive throaty roar is, the ad implies, all you need to know.
Maserati is not alone in this thinking. Engine note has become a significant brand statement and "vital in expressing a car's character and the company's emphasis on performance", says Nicola Boari, Ferrari's head of product marketing. "Each model is individually engineered to give it a recognisable sound, just like a musical instrument. The sound is taken into consideration from the moment we start to engineer a new engine."
Certainly, Steve Arnott's job has taken a turn. Aston Martin's powertrain sound-quality expert – a man with a background in acoustics rather than cars – began his career designing exhaust systems to make them quieter, which is precisely what most non-supercar drivers want.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
"But in doing that you learn how to work with resonance in the pipes to make a certain note," explains the man behind what the company is calling its new DB11's "sonic identity". "Engines all produce the same frequencies, so it's about emphasising some over others, just as singers do. For a car brand to have a distinctive engine sound is just as important."
In broad strokes, he cites the distinction between the "very racy, high-revving, screaming sound" of Italian sportscars versus the "low and rumbling" sound of US supercars, placing Aston Martin's "gravelliness" somewhere in the middle. But developing a more precise brand sound is, of course, more complex than these descriptions allow for.
At Aston Martin, the marketing department will suggest the kind of sound it wants from a proposed car, then independent juries are used to assess preferred sounds "blind" – including those of competitor companies – and advanced simulation tools are used to work out if such a sound can be achieved with the engine.
After this effort, it's no wonder makers want drivers to be able to hear this mechanical music. In developing its LFA, for example, Lexus worked with Yamaha – the instrument-maker, not the engine-builder – to help develop components that direct engine sound to the cabin. With Ferrari's front-engined cars, in which the engine is relatively more distant from the cabin and isolated by the front bulkhead, special tubes are used to channel a small amount of sound from the intake plenum to the cabin.
Ferrari stresses the sound of its engines is never enhanced, but this is not always the case for other manufacturers. BMW, for example, has found the chassis of its M5 so effective at isolating the cabin from outside noise that it chose to play an exterior recording of the engine through the car's stereo, the precise sample played selected according to RPM. Porsche's "Sound Symposer" is a tube housing a diaphragm and a valve that, in sport mode, opens to amplify the engine sound. Closed, it allows for quieter cruising. More such systems might well be expected from other carmakers.
Indeed, although the advent of an all-electric supercar may be some time away, perhaps engine sound will one day be silenced for good. However, the industry is considering the need for electric cars to generate some kind of sound – as a warning to pedestrians – and Aston Martin's Arnott says he can't envisage a time when supercars will simply play their sound from speakers, nor when drivers would accept such an artifice. An authentic sound, he suggests, is so integral to the pleasure of driving a supercar, it might preclude the development of an all-electric model in the first place.
"Clearly, the sound is going to be an issue," he says. There is a worrying note to his voice.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
The week's best photos
In Pictures Firing shells, burning ballots, and more
By Anahi Valenzuela, The Week US Published
-
The Great Mughals: a 'treasure trove' of an exhibition
The Week Recommends The V&A's new show is 'spell-binding'
By The Week UK Published
-
Damian Barr shares his favourite books
The Week Recommends The writer and broadcaster picks works by Alice Walker, Elif Shafak and others
By The Week UK Published
-
Aston Martin DBX707 review: the fastest production SUV on sale
feature A ‘true leviathan’, the 707 is a very different type of DBX
By The Week Staff Published
-
Aston Martin Vantage Roadster: ‘a hot rod with manners’
Speed Read Majestic convertible has a top speed of 190mph
By The Week Staff Last updated
-
AMR-C01: Aston Martin unveils £57,500 luxury racing simulator
Speed Read Could this be the ultimate addition to your home games room?
By Mike Starling Published
-
Maserati MC20: new era is launched with a super sports car ‘100% made in Italy’
Speed Read Successor to the MC12 has a top speed of 202mph and will cost around £187,230
By Mike Starling Published
-
Troubled Aston Martin loses over £100m in 2019
In Depth The luxury car builder continues to plunge deeper into the red, and its £500 million bailout boost has been tarnished by coronavirus fears
By William Gritten Last updated
-
Aston Martin has launched a luxury chopper for Bond villains
Speed Read If you’ve a few million to spare, the man at Aston Martin wants to talk to you
By The Week Staff Last updated
-
Aston Martin heads off road with the all-new DBX
Speed Read Aston Martin, Britain’s supercar maker, is branching out into SUVs. Its new DBX looks a winner.
By Nicole Garcia Merida Last updated
-
Maserati Alfieri 2020: official spy shots, specs, price and release
In Depth Test mule based on an Alfa Romeo 4C previews rumoured new hybrid engine
By The Week Staff Last updated