The cambarysu was a drum which Jose Bach said he saw the Catuquinaru tribe of Brazil use, when he visited them in 1896–97, to communicate between villages...

Brazil reportedly used a drum called the cambarysu to send vibrations through the ground to other cambarysus up to 1.5 km away. Some scholars expressed...

language to communicate over distances of up to 1.5 km via drums called cambarysus. Indian wireless system of communication, in Telegraph and Telephone Age:...