OK the Bullroarer (like the Carnyx and several other instruments) is supposed to make a very intimidating noise. They were (and are) sometimes used to impress people, as parts of various ceremonies, and – at least with the Carnyx and old stories of it’s use in battle –to try and ...
Instruments The players' position data were collected through a Local Positioning System (LPS) (Kinexon Precision Technologies, Munich, Germany), which has been recently validated [7] and used in studies on team sports [8,9], showing adequate between-device reliability (coefficient of variation ...