30000 Hz (30 kHz) Sound Generator Online — Ultrasonic Tone
Generate a 30,000 Hz (30 kHz) ultrasonic tone online, free in your browser. Useful for testing ultrasonic devices, transducers, and pet-safe deterrents. 30 kHz is above the human hearing range.
What is 30,000 Hz Sound?
30,000 Hz (30 kHz) sits in the lower ultrasonic range — too high for humans to hear (the typical adult upper limit is ~17–20 kHz) but well within the hearing range of dogs, cats, rodents, and bats. 30 kHz is also a common operating frequency for ultrasonic transducers in cleaning baths, distance sensors, and pest deterrents.
Real 30 kHz output requires a sound card running at 96 kHz sample rate or higher plus speakers that can reproduce ultrasonic frequencies. Standard consumer hardware will accept the signal but may not actually play it — most laptop speakers and headphones roll off sharply above 20 kHz.
Features
Pure 30 kHz Tone
Mathematically precise ultrasonic sine wave generated live by the Web Audio API.
Range 1 kHz – 40 kHz
Sweep from the upper audible range deep into the ultrasonic for full hearing tests.
Repellent Verification
Check that your ultrasonic pest device is producing real ultrasonic output.
Browser-Native
No app downloads or signup — works on phones, tablets, laptops.
Live Frequency Control
Slider updates the tone in real time with no glitches between values.
Safety First
Soft fade-in prevents transducer damage. Always start at low volume.
Common Uses
Audit dog, cat, mouse, or insect repellent devices for proper ultrasonic emission.
Drive 30 kHz piezo or magnetostrictive transducers in DIY ultrasonic projects.
Discover your personal hearing cutoff — most adults cannot hear above 17 kHz.
Confirm that your hi-res audio interface really outputs ultrasonic content.
How to Use
1. Choose Waveform
Pick sine, square, sawtooth, or triangle depending on the tone character you need.
2. Set Frequency
Use the slider or tap a preset to dial the exact frequency you need.
3. Adjust Volume
Start at low volume — pure tones can be louder than they feel.
4. Press Play
Hit Play and the tone keeps playing continuously until stopped.
Frequently Asked Questions
No. The upper limit of human hearing is around 17–20 kHz for young adults and decreases with age. 30 kHz is comfortably in the ultrasonic range.
Dogs (up to ~45 kHz), cats (~64 kHz), mice (~90 kHz), and bats (up to 200 kHz) can all hear 30 kHz tones. This is why ultrasonic pest repellents target this region.
Either your audio device samples below 60 kHz (Nyquist), your speakers cannot reproduce ultrasonic frequencies, or you are too old to hear close to that range. All three are common.
Industrial ultrasonic cleaners typically operate between 20 kHz and 40 kHz, so 30 kHz is right in that range. However our tool outputs through your speakers, not a cleaning transducer — it is for monitoring/reference only.
At browser-volume playback through laptop speakers: no. The actual emitted ultrasonic SPL is very low. Dedicated ultrasonic devices that hurt pets use far higher power.
Hearing Safety
Pure tones — especially below 40 Hz or above 10 kHz — carry significant energy at high volumes. Start low and protect your hearing and speakers.