Drum mark
Drum signals are acoustic signals that are sent with a message drum .
Not only humans but also animals use such signals. For example, stone flies knock on the ground with their abdomen, and it is known from African termites that the "soldiers" of two species give acoustic signals with their heads.
literature
- Felix A. Hager, Wolfgang H. Kirchner: Vibrational long-distance communication in the termites Macrotermes natalensis and Odontotermes sp. In: Journal of Experimental Biology. Volume 216, 2013, pp. 3249-3256, doi: 10.1242 / jeb.086991