Auditorium Infrared Sound System
https://www.cardionics.com/product/learning-systems/auditorium-infrared-sound-system
The Auditorium Infrared Sound System (ISS) transmits heart, lung, bowel and Korotkoff sounds to a small or large audience with each person wearing a Wireless HeartMan Infrared Headphone (HIH).
https://www.cardionics.com/product/learning-systems/auditorium-infrared-sound-system
The Auditorium Infrared Sound System (ISS) transmits heart, lung, bowel and Korotkoff sounds to a small or large audience with each person wearing a Wireless HeartMan Infrared Headphone (HIH).