Acoustic bird deterrents
Bird repellent devices, acoustic signals or ultrasonic devices offer reliable bird deterrents. Effective bird control is important because, in addition to the audible nuisance, birds also cause economic damage. This ranges from contamination with feces to complete crop failures.
Repelling pigeons with ultrasound
A good way to scare away birds - especially pigeons - is to use ultrasound. Pigeons do not hear the ultrasonic waves, but they feel them as an unpleasant pressure wave and will usually avoid the area. Pigeon deterrent devices with ultrasound usually have a frequency of 20-23 kHz (kilohertz), which is generally not perceptible to humans. When using ultrasound to deter pigeons, it is important that the device also drives away the animals using light reflexes or movement and that the ultrasound frequencies vary. The changing frequencies ensure that pigeons do not get used to it. This well-researched guide provides additional methods to scare away pigeons. Here, tenants can also find answers to the questions about who is responsible for keeping pigeons away in an apartment building and when a rent reduction is possible.
Bird deterrent devices
Bird deterrent devices work with different methods. The acoustic bird deterrent simulates a loud cry from birds of prey or a frightened cry from crows or ravens. These screams frighten the animals and they flee. However, bird control devices that use acoustic methods must vary the signal volume and type. This is the only way to ensure that the birds do not get used to the noise and, over time, realize that there is no real danger.
Birds repel ultrasound
The scarecrow of birds can be quickly achieved using ultrasound devices. The birds do not perceive the ultrasound waves as sounds. Rather, birds feel the ultrasound as a pressure wave, which is very unpleasant. Birds cannot identify the source of the ultrasound source and avoid areas where they perceive the ultrasound waves as a feeling of pressure. Depending on the bird species, the ultrasonic signal must be adjusted. Sparrows are particularly resistant, which is why a high Hz number is required for this species, which should also be emitted over a long period of time. Further information on the subject Bird deterrents.
Repelling sparrows with ultrasound
The little pests can also cause a lot of damage if they appear in real hordes of sparrows. Ultrasound devices provide prompt and lasting help. The ultrasound devices are available in different strengths and can be used almost anywhere. The sparrows register the pressure wave that occurs at regular intervals in an area and avoid it over a large area. However, sparrows are rather resistant, which is why a strong ultrasound signal is necessary to permanently scare them away. Ideally, several devices are set up in different places so that the pressure waves are radiated over a large radius and provide an effective defense against sparrows.
Crows are driven away by ultrasound
Crows are extremely sensitive to noise and don't like noise. Where acoustic signals cannot help, ultrasonic devices can be used to drive away the crows. The advantage of using ultrasonic devices to scare away crows is that no one other than the crows notices the ultrasonic waves. Humans cannot perceive the ultrasound waves, which is why this method can be used completely unnoticed. The ultrasonic waves create a feeling of pressure in crows, which can be very uncomfortable depending on the strength. Although crows are very adaptable, they cannot tolerate the pressure wave that radiates across the entire body. The advantage of crows is that there is a real warning system between the animals. Once a horde of crows has been driven away by ultrasound, it is unlikely that another horde will settle. Using ultrasound, crows can be driven away quickly and in the long term.