Low frequency device to avert bird strike threat

Researchers have developed a new device that fires low frequency sound waves, below the range of human hearing, to scare birds away from flight paths.

Noise makers are often used to scare birds away from airports although loud sounds also annoy local neighbourhoods.

The new system developed by Technology International, based in Laplace, Louisiana, aims to deter birds using infra-sound – below 20 Hertz or cycles per second, the “normal” limit of human hearing.

The Avian Infra-sound Non-lethal Denial System has a passive infra-sound detector that listens for an approaching flock, and activates a series of rotary subwoofers that generate high-intensity, but low-frequency sound.

Abdo Husseiny, the firm’s CEO said the system should be commercially available within two years.

Read: Comment: Why we can’t stop birds downing aircraft? (New Scientist)


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