As we move to electric and hybrid vehicles, the relative silence is proving an issue:
Here The Mercedes Benz sound design team talks about how it designs the car acoustics to make the identical engine sound different between it’s family sedan and it’s sport coupé model. (I have been talking about this for years and finally have some proof that they’re doing it!). The key phrase to look out for is “two acoustic patterns for the same engine performance”.
And, the design of the indicator sounds:
Which finally led me to: