Toyota Prius 'voice' revealed

The days of the quiet Toyota Prius could be numbered, with a new YouTube video that seems to feature the artificial sound that the hybrid is expected to make appearing this week.

The 'Vehicle Proximity Notification System' is designed to make the Prius and its siblings, the Plug-in Prius and Prius v, as audible as their gasoline counterparts in the absence of a loud engine noise.

Described by some as sounding like a spaceship, the futuristic sound is emitted from a speaker mounted underneath the hood at speeds of up to 15 miles per hour or 25 km/h (after which the noise of the wheels is audible).

Like a gasoline engine, the pitch of the audio changes depending on whether the vehicle is speeding up or slowing down, and it uses a blend of frequencies to help ensure that it isn't muffled by obstacles or background noise.

Under US legislation passed this year, all new electric vehicles will be required to make some kind of artificial sound to ensure that at-risk road users such as cyclists and the visually impaired are aware of their presence.

Similar moves are expected in Europe, where the Prius Plug-In will also go on sale in the first half of next year.

Listen to the sounds:

Toyota Prius: http://www.youtube.com/watch?v=O1YVwM3HpII

Nissan Leaf: http://www.youtube.com/watch?v=3yO5msMEGZI


 

Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

SPONSORED FEATURES

ES Rentals

    iJobs Job Widget
    iJobs General

    Recruitment Genius: Sales Executive or Senior Sales Executive - B2B Exhibitions

    £18000 - £30000 per annum: Recruitment Genius: A Sales Executive or Senior Sal...

    Recruitment Genius: Head of Support Services

    £40000 - £55000 per annum: Recruitment Genius: This is an exciting opportunity...

    Recruitment Genius: Warehouse Team Leader

    £22000 per annum: Recruitment Genius: This industry leading company produces h...

    Recruitment Genius: Business Development Manager / Sales - OTE £40,000

    £20000 - £40000 per annum: Recruitment Genius: This IT provider for the educat...

    Day In a Page

    The Silk Roads that trace civilisation: Long before the West rose to power, Asian pathways were connecting peoples and places

    The Silk Roads that trace civilisation

    Long before the West rose to power, Asian pathways were connecting peoples and places
    House of Lords: Outcry as donors, fixers and MPs caught up in expenses scandal are ennobled

    The honours that shame Britain

    Outcry as donors, fixers and MPs caught up in expenses scandal are ennobled
    When it comes to street harassment, we need to talk about race

    'When it comes to street harassment, we need to talk about race'

    Why are black men living the stereotypes and why are we letting them get away with it?
    International Tap Festival: Forget Fred Astaire and Ginger Rogers - this dancing is improvised, spontaneous and rhythmic

    International Tap Festival comes to the UK

    Forget Fred Astaire and Ginger Rogers - this dancing is improvised, spontaneous and rhythmic
    War with Isis: Is Turkey's buffer zone in Syria a matter of self-defence – or just anti-Kurd?

    Turkey's buffer zone in Syria: self-defence – or just anti-Kurd?

    Ankara accused of exacerbating racial division by allowing Turkmen minority to cross the border
    Doris Lessing: Acclaimed novelist was kept under MI5 observation for 18 years, newly released papers show

    'A subversive brothel keeper and Communist'

    Acclaimed novelist Doris Lessing was kept under MI5 observation for 18 years, newly released papers show
    Big Blue Live: BBC's Springwatch offshoot swaps back gardens for California's Monterey Bay

    BBC heads to the Californian coast

    The Big Blue Live crew is preparing for the first of three episodes on Sunday night, filming from boats, planes and an aquarium studio
    Austin Bidwell: The Victorian fraudster who shook the Bank of England with the most daring forgery the world had known

    Victorian fraudster who shook the Bank of England

    Conman Austin Bidwell. was a heartless cad who carried out the most daring forgery the world had known
    Car hacking scandal: Security designed to stop thieves hot-wiring almost every modern motor has been cracked

    Car hacking scandal

    Security designed to stop thieves hot-wiring almost every modern motor has been cracked
    10 best placemats

    Take your seat: 10 best placemats

    Protect your table and dine in style with a bold new accessory
    Ashes 2015: Alastair Cook not the only one to be caught in The Oval mindwarp

    Cook not the only one to be caught in The Oval mindwarp

    Aussie skipper Michael Clarke was lured into believing that what we witnessed at Edgbaston and Trent Bridge would continue in London, says Kevin Garside
    Can Rafael Benitez get the best out of Gareth Bale at Real Madrid?

    Can Benitez get the best out of Bale?

    Back at the club he watched as a boy, the pressure is on Benitez to find a winning blend from Real's multiple talents. As La Liga begins, Pete Jenson asks if it will be enough to stop Barcelona
    Athletics World Championships 2015: Beijing witnesses new stage in the Jessica Ennis-Hill and Katarina Johnson-Thompson heptathlon rivalry

    Beijing witnesses new stage in the Jess and Kat rivalry

    The last time the two British heptathletes competed, Ennis-Hill was on the way to Olympic gold and Johnson-Thompson was just a promising teenager. But a lot has happened in the following three years
    Jeremy Corbyn: Joining a shrewd operator desperate for power as he visits the North East

    Jeremy Corbyn interview: A shrewd operator desperate for power

    His radical anti-austerity agenda has caught the imagination of the left and politically disaffected and set a staid Labour leadership election alight
    Isis executes Palmyra antiquities chief: Defender of ancient city's past was killed for protecting its future

    Isis executes Palmyra antiquities chief

    Robert Fisk on the defender of the ancient city's past who was killed for protecting its future