Audio-based ticket system launched and other tech news

BBC Click’s Kat Hawkins looks at some of the best of the week's technology news stories including:

  • Volvo announces that all new models of cars will have an electric motor from 2019

  • Formula 1 racing team Williams unveils a carbon fibre baby carrier which can transport critically ill new-born infants in an ambulance or helicopter

  • Ticketmaster and Lisnr team up to offer an audio-based ticket system

See more at Click's website and @BBCClick.