Alipay has launched a new payment system in the Beijing subway that uses sound waves to connect smartphones with ticketing machines. The sound wave payment system was introduced with the Alipay Wallet mobile app in January and uses white noise (link via Google Translate) generated by a smartphone to carry digital information to another device. Initially used for smartphone-to-smartphone transactions, the Beijing Subway launch marks the first time the system has been used with a payment kiosk for consumer transactions, according to Xinhua (link via Google Translate).Source: http://feedproxy.google.com/~r/Techcrunch/~3/_XjI1iEKmA8/
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