Posted on https://www.osa.org on the 23 January 2019 Photoacoustic communication approach could send warning messages through the air without requiring a receiving device. WASHINGTON — Researchers have demonstrated that a laser can transmit an audible message to a person without any type of receiver equipment. The ability to send highly targeted audio signals over the air could … Continue reading New Technology Uses Lasers to Transmit Audible Messages to Specific People