Key Takeaways
- No — ultrasonic pest repellers don’t work on bed bugs. Controlled studies found bed bugs are neither repelled nor attracted by the sound.
- Regulators agree. The U.S. Federal Trade Commission warned dozens of manufacturers that their effectiveness claims aren’t backed by evidence.
- The “side effects” are mostly to your wallet — though the sound can bother some pets and rodents, and it gives a false sense of security while an infestation grows.
- Spend the money on what works: heat, encasements, steaming, and monitoring.
Ultrasonic repellers are marketed as a plug-in, chemical-free fix for everything from mice to bed bugs. For bed bugs, the honest answer is simple: they don’t work, and relying on one lets the problem get worse.
Do ultrasonic repellers work on bed bugs?
No. When researchers at Northern Arizona University tested commercially sold ultrasonic devices on bed bugs (published in the Journal of Economic Entomology), the bugs were neither repelled nor attracted by the high-frequency sound. Other lab and field studies have found little to no effect on common household pests generally.
Regulators reached the same conclusion years ago: the U.S. Federal Trade Commission (FTC) sent warning letters to dozens of companies selling ultrasonic repellers, stating that their efficacy claims were not supported by scientific evidence.
Why they fail
Even setting the studies aside, the physics work against these devices:
- Sound doesn’t pass through walls or furniture, creating “shadow zones” where bed bugs sit untouched — and bed bugs live deep in seams and cracks, exactly those zones.
- Pests acclimate. Any creature that does notice the sound tends to desensitize within days.
- Bed bugs find you by heat and CO₂, not sound, so a noise has no bearing on whether they come to feed.
Are ultrasonic repellers dangerous? (The real “side effects”)
For people, plug-in ultrasonic units are generally harmless — you usually can’t even hear them. The genuine downsides:
- Pets and rodents can hear ultrasound. Dogs, cats, and especially pet rodents (hamsters, guinea pigs) may be stressed or bothered by some devices.
- False security. The biggest harm is that someone “treats” with one of these and stops doing the things that actually work, while the infestation keeps breeding.
What to use instead
Put the money toward methods with evidence behind them: hot-dryer laundering, mattress encasements, steaming, and monitoring — all in our bed bug treatment guide.
Frequently asked questions
Do ultrasonic pest repellers work on bed bugs?
No. Studies show bed bugs aren’t affected by the sound, and the FTC has warned manufacturers that their claims lack scientific support.
Are ultrasonic repellers safe for pets?
For most pets they’re harmless, but dogs, cats, and pet rodents can sometimes hear and be bothered by the ultrasound. If a pet seems stressed, unplug the device.
Do any electronic devices get rid of bed bugs?
No plug-in gadget eliminates bed bugs. The effective tools are physical — heat, steam, encasements — used as part of a plan.