Ultrasound against martens is one of the most frequently recommended methods to keep these pesky predators away from your car, attic, and garden. But what do real experiences actually show? Does ultrasound work reliably against martens, or is it an expensive disappointment? In this article, we share practical experiences, explain the technology behind it, and provide clear recommendations for the best devices.
Why martens are a serious problem
Before we turn to ultrasound solutions, a quick look at the damage martens can cause:
- Car: Stone martens bite through ignition cables, coolant hoses, insulation mats, and rubber seals. Repair costs quickly reach 500–2,000 euros. In Germany, around 200,000 marten damages to cars are reported annually.
- Attic: Martens use attics as sleeping places, storage areas, and toilets. Feces, urine, and leftover prey cause odors, stains, and can destroy roof insulation.
- Garden: Martens can kill chickens and rabbits and plunder bird nests.
Since stone martens are synanthropic animals that frequently live near human settlements, the likelihood of a marten problem is particularly high in suburbs and rural areas. Also read our article Home remedies against martens: Do they work? for a comprehensive overview.
How does ultrasound work against martens?
Martens can hear frequencies up to about 30,000 Hz and are sensitive to high-frequency sounds in the range of 18,000–28,000 Hz. Ultrasound devices for marten control emit exactly these frequencies, creating an extremely unpleasant acoustic environment for the marten.
The best ultrasound devices against martens are characterized by the following features:
- Automatic frequency switching: Martens are intelligent animals that can become accustomed to constant sounds. Frequency switching prevents this effect.
- High sound pressure: The louder the ultrasound (measured in decibels), the more unpleasant it is for the marten and the greater the effective range.
- Motion sensor: Devices that activate when motion is detected surprise the marten and enhance the startle effect. At the same time, they save energy.
- Combination with other stimuli: Flashing light and audible warning sounds complement the ultrasound and increase effectiveness.
Experiences with ultrasound against martens: What users report
Experiences with ultrasound against martens are quite positive — provided the right devices are used correctly. Here are the key findings from user reports:
Positive experiences
- The majority of users report that martens leave the area permanently within 1–3 weeks after installing a high-quality ultrasound device.
- Devices with motion sensors are particularly effective because the sudden ultrasound pulse startles the marten more than continuous noise.
- Results are especially good in attics, where sound reflects and spreads throughout the space.
- Users who combined ultrasound with sealing entry points report the best long-term results.
Negative experiences and their causes
- Cheap devices with only a single fixed frequency and low sound pressure often deliver disappointing results.
- In open spaces without reflective surfaces, ultrasound disperses and quickly loses effectiveness.
- If entry points are not sealed, martens sometimes return despite ultrasound — territorial instinct is very strong in martens.
- Some individual martens seem to be less sensitive to ultrasound than others.
Recommended ultrasound devices against martens
The ComboSonic Marten, Weasel, Rodent and Insect Control covers a particularly large area of up to 850 m². The device automatically switches between different frequencies and is thus well-protected against habituation. Ideal for large attics and barns.
Special feature: Also effective against weasels, rodents, and insects.
The Powerful ultrasound repellent against martens is specifically designed for marten control and offers high sound pressure in frequencies that are particularly unpleasant for martens. Compact design for mounting in engine compartments and garages.
The Battery-operated marten and rodent repellent is the perfect solution for garden sheds, storage buildings, and other places without electrical outlets. Thanks to battery operation, it's flexible and ready to use immediately.
Ultrasound against martens: Application sites and practical tips
Ultrasound in the engine compartment
The engine compartment is one of the most common places to use ultrasound against martens. Please note the following tips:
- Mount the device so that the ultrasound covers the entire engine compartment — ideally centrally positioned.
- Make sure the device is heat-resistant and can tolerate engine compartment temperatures.
- Combine ultrasound with a thorough engine wash to remove the marten's scent marks.
- Regularly check the device's battery.
Ultrasound in the attic
Conditions in the attic are particularly favorable for ultrasound against martens:
- The enclosed space reflects the ultrasound and enhances its effect.
- Place the device near the entrance the marten uses.
- After repelling the marten: Seal the entry point! Otherwise, the marten will return when the device is turned off.
- Remove any leftover prey and feces from the marten, as these attract other martens.
Ultrasound in the garden
In open spaces, ultrasound is less effective against martens because sound disperses in all directions. For this reason, devices with motion sensors and additional flashing light are recommended to maximize the startle effect.
For more information, see our Ultrasound animal repellent test 2026 and the comparison of Solar animal repellents with motion sensors.
Frequently asked questions (FAQ)
How quickly does ultrasound work against martens?
Most users report that martens permanently leave the exposed area within 1–3 weeks. In some cases, it can happen faster, especially if the device has a motion sensor and the marten is startled on its first visit.
Can a marten get used to ultrasound?
Yes, with low-quality devices that use a single fixed frequency, habituation is possible. High-quality devices with automatic frequency switching and varying intervals prevent this to a large extent. The combination with flashing light further increases effectiveness.
Is ultrasound against martens legal?
Yes, ultrasound devices for marten control are completely legal in Germany, Austria, and Switzerland. They do not injure or kill animals and are therefore compatible with animal protection laws. Unlike some other methods, you do not need a proof of competence.
Will ultrasound against martens bother my cat?
Cats hear similar frequencies to martens and can perceive the ultrasound. If your cat needs to use the protected area (e.g., garage), a device with a motion sensor is recommended, which you can disable if needed. Alternatively, there are frequency-selective devices available.
Does ultrasound also eliminate marten odors?
No, ultrasound does not eliminate odors. Existing scent marks and contamination must be cleaned separately. Use enzyme cleaners to neutralize marten odor. This is important because the smell attracts other martens.
