Rodent Repellent
Free online ultrasonic rodent repellent with anti-habituation technology. Three target modes (mouse, rat, universal) and four sweep patterns prevent rodents from adapting to the signal. Set a session timer and let it run for hours.
Repel mice and rats with anti-habituation ultrasonic frequency sweeps
100% in-browser. No audio is sent to any server.
Check if your device can output high-frequency sound. A short 18 kHz tone will play for 2 seconds.
Download for Offline Use
Generate an audio file with your current settings to play on any device without internet.
For sessions longer than 2 hours, set your media player to repeat/loop mode.
Ensure your playback device can reproduce frequencies above 16 kHz.
- Pet hamsters, guinea pigs, rabbits, and other pet rodents will be affected. Remove them from the room.
- Children and young adults (under 25) may hear a high-pitched tone. Not harmful at normal volume.
- Phone/laptop speakers have limited ultrasonic output. External speakers with tweeters or Bluetooth speakers work significantly better.
- Scientific evidence for ultrasonic repellence is mixed. Use as a supplement to other pest control methods.
- Dogs and cats can hear these frequencies and may be disturbed.
This tool generates 15-22 kHz frequencies via Web Audio API. Professional ultrasonic repellers operate at 32-62 kHz at 85-100 dB SPL, which consumer speakers cannot reproduce. This provides the maximum range achievable through standard audio hardware.
Features
How to Repel Rodents with Ultrasonic Sound
- Open this page and run the speaker test to verify your device can output high-frequency sound.
- Select your target pest (Mouse, Rat, or Universal) and a sweep pattern.
- Set volume to maximum and choose a session duration (1-8 hours recommended).
- Place the device in the room with rodent activity, speaker facing the area.
- Press START SESSION and leave the device running. The anti-habituation engine varies the signal automatically.
- For best results, use external speakers and run daily, especially at night.
Does ultrasonic sound actually repel mice and rats?
Ultrasonic frequencies can cause discomfort to rodents, but scientific evidence is mixed. Research shows frequency sweeping is 45% more effective than constant tones, and the anti-habituation approach used here (varying frequency, pattern, and timing) helps prevent rodents from adapting. This tool should supplement, not replace, professional pest control.
What is anti-habituation and why does it matter?
Rodents can get used to a constant ultrasonic tone within 48 hours to 7 days. The anti-habituation engine automatically changes the frequency, pattern, and timing every 45 seconds so the sound remains unpredictable and uncomfortable for rodents.
What is the difference between mouse and rat modes?
Mice hear best at 15-20 kHz and 30-50 kHz, while rats peak around 20-32 kHz. Since consumer speakers max out at ~20-22 kHz, Mouse mode focuses on 16-20 kHz and Rat mode on 18-22 kHz to match each species' hearing sensitivity within the available range.
Can my phone speakers produce ultrasonic sound?
Most smartphones can output up to 16-18 kHz with decreasing power. Bluetooth speakers and desktop speakers with tweeters reach 18-20+ kHz much more effectively. Use the built-in speaker test to check your device.
Is this safe for pets?
Pet rodents (hamsters, guinea pigs, rabbits, gerbils) will be strongly affected — remove them from the room. Dogs (hearing up to 45 kHz) and cats (up to 64 kHz) may also be disturbed. Fish and reptiles are unaffected.
How long should I run the repeller?
For best results, run for several hours daily, especially at night when rodents are most active. The session timer supports up to 8 hours. Consistency matters more than duration — regular daily use is more effective than occasional long sessions.
Is this as good as a hardware repeller?
Professional ultrasonic repellers use specialized transducers at 32-62 kHz and 85-100+ dB SPL — frequencies and power levels consumer speakers cannot achieve. This tool provides the best performance possible within browser and speaker limitations, and is useful as a supplementary deterrent.
