Birds can be a serious nuisance in a wide range of settings - from warehouses and factories to boats and commercial buildings. One method often used for non-lethal bird control is ultrasonic sound. But what exactly is it, and how effective is it at keeping birds away?
What Is Ultrasonic Sound?
Ultrasonic sound refers to sound waves that are above 20,000 Hz (20 kHz), beyond the range of human hearing. While humans generally can’t hear these high frequencies, some animals, including birds can detect sounds in this ultrasonic range.
This makes ultrasonic sound an attractive option for bird control, especially in environments where quiet, non-intrusive methods are preferred.
How Does Ultrasonic Sound Deter Birds?
Ultrasonic bird deterrent devices emit high-frequency sounds that are unpleasant or disorienting to birds. Here's how they work:
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Causes Discomfort
The high-pitched sounds can create a sense of irritation or unease for birds that can hear them, encouraging them to leave the area. -
Disrupts Communication
Birds often rely on sound to communicate with one another, especially when flocking or nesting. Ultrasonic sound can interfere with this communication, making the area feel unfamiliar and unsafe. -
Creates a Hostile Environment
Much like flashing lights or physical deterrents, ultrasonic signals make the area feel threatening. Birds often choose to roost or nest in locations that feel calm and secure—ultrasound disturbs that peace.
Important Considerations
While ultrasonic devices can be effective in the right situation, there are a few important things to keep in mind:
- Not All Birds Are Affected: Some common pest birds, like pigeons and sparrows, may not hear ultrasonic frequencies effectively, or have adapted to living in noisy environments
- Environmental Factors Matter: In open spaces, ultrasonic waves can dissipate quickly or be blocked by walls, machinery, or other obstacles. Windy environments in outdoor areas also decrease the coverage
- Best Used as Part of an Integrated System: For best results, ultrasonic sound should be used alongside visual deterrents, lasers, netting and roost deterrents.
- Not an instant fix: It can take time for birds to realise what is happening and learn to avoid the area
When Should You Use Ultrasonic Bird Deterrents?
Ultrasonic devices are especially useful in:
- Warehouses and distribution centres
- Covered loading docks or sheds
- Commercial buildings with sensitive noise restrictions
- Barns and storage facilities
- Boats
- Small specific areas you want to cover
Ultrasonic deterrents work best in enclosed or semi-enclosed areas where the sound waves can bounce off surfaces, creating a more immersive deterrent field.
Because they are silent to humans, ultrasonic bird deterrents are perfect for settings where noise control is essential.
Not sure if ultrasonic deterrents are right for your site?
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