« Yamaha has been advancing the research and development of INFOSOUND acoustic information transmission technology since 2008. The transmission of information using sound waves has three main benefits in that they enable the use of conventional speaker equipment; the simultaneous delivery of data to multiple receivers (one-to-many data delivery); and control of the range of access by volume and speaker directionality ». (via New Way of Transmitting Information by Audio Frequency Yamaha and Showa University School of Medicine Conclude Joint Research into Human Body’ s Stress Response to INFOSOUND(TM) – 2012 – News Release – Yamaha – Global)