ADVERTISEMENTThis Bengaluru-Based Company Is Using Sound Waves To Make PaymentsThis Bengaluru-Based Company Is Using Sound Waves To Make Payments NDTV Profit09 Mar 2018, 05:00 PM IST 09 Mar 2018, 03:36 PM IST09 Mar 2018, 05:00 PM ISTWhatsAppX (was Twitter)FacebookTelegramSaveThis Bengaluru-Based Company Is Using Sound Waves To Make PaymentsADVERTISEMENT