FLAGSTAFF, Ariz. -- Scientists are warning consumers not to buy devices that claim to repel bed bugs because they do not work.
The devices that produce sound waves to deter the pests are available to the public and sold online.
However, when researchers tested four different devices, there was no difference in the number of bed bugs from the control group, which used no sound.
They say bed bugs were not attracted or repelled by ultrasonic frequencies sent by these devices, but suggest lower frequency sounds could be more effective.
This study was led by researchers at Northern Arizona University and published in 'Journal of Economic Entomology'.