Ultrasound repellents give the martens an earful
Martens have excellent hearing. The STOP&GO ultrasonic devices use this to their advantage. They simulate fear and warning cries in the ultrasound range – at a constantly changing frequency so that the martens cannot tune them out. Humans cannot hear these frequencies, but martens will flee them. There are different models for use with different vehicle designs and in different locations. The ultrasound generators can be connected to the car’s onboard power supply or be powered by batteries.