TOKYO--(BUSINESS WIRE)--Yamaha Corporation (Head Office: 10-1, Nakazawa-cho, Naka-ku, Hamamatsu, Shizuoka Prefecture, Japan; President: Mitsuru Umemura) announces that it has conducted joint research with Showa University (1-5-8 Hatanodai, Shinagawa-ku, Tokyo; President: Takashi Katagiri) into the effects on the human body of INFOSOUND, the Yamaha-developed means of transmitting digital information using the very high audio frequency sound range. Professor Seiji Shiota and Visiting Professor Kazue Sato of the Showa University School of Medicine’s Department of Anatomy I conducted the research, which verified that “INFOSOUND signals do not cause an unacceptable increase in stress at the volume levels normally used in communication.”
