Engineering Questions – If all the vehicles in the world were to convert to electric, would it be quieter?
If everyone everywhere received a free electric vehicle at the same time – and owners were required to travel at really slow speeds across well-maintained roads – the world would sound different. But that doesn’t mean it would be quieter. People can have different feelings about the same...
Engineering Ideas – Can we make drones sound less annoying by factoring in humans at the design stage?
These days almost everyone has either flown a drone or listened to the nasty whining sound they produce. Although small drones (up to 20kg) are about 40 decibels quieter than conventional civil aircraft, they produce a high pitched noise – which people tend to find very annoying. One...