For the first time, a sound reflection system is applied in a marten repeller. This allows for a 360-degree omnidirectional radiation. This SecoRüt high-performance marten repeller, developed and manufactured in Germany, protects your vehicle from all unpleasant marten damage that can have serious consequences. A cone in a convex shape is arranged over a piezo speaker with a Nawimembrane, having the same shape and diameter as the Nawimembrane. The convexly curved cone is positioned at a specific distance above the central axis. The height of the cone and the distance are tuned for the narrowband radiation frequency and sound pressure. This arrangement generates a high sound pressure and 360-degree omnidirectional radiation. A high-performance ultrasonic generator with a C-MOS output stage drives the piezo speaker. The piezo speaker produces an ultrasonic tone of 22.5 kHz +/- 1 kHz, which is inaudible to humans. The sound level drives away martens and wildlife up to a range of approximately 350 meters due to this special arrangement. The system switches on and off at specific time intervals. A bright white LED additionally unsettles the martens.