50000 Hz (50 kHz) Sound Generator Online — Ultrasonic Tone
Generate a 50,000 Hz (50 kHz) ultrasonic tone online. Useful for testing ultrasonic devices, animal-repellent gadgets, and high-frequency equipment. Note: 50 kHz is above the human hearing range and most consumer playback devices.
What is a 50,000 Hz Sound?
50,000 Hz (50 kHz) is an ultrasonic frequency — well above the upper limit of human hearing (typically ~20 kHz for young adults). 50 kHz tones are widely used in industrial cleaning, animal repellent devices, dolphin and bat communication studies, and certain medical imaging applications.
Important: most consumer audio hardware operates at 44.1 kHz or 48 kHz sample rates, which means the maximum reproducible frequency (the Nyquist limit) is about 22 kHz or 24 kHz. To actually output 50 kHz, you need a hi-resolution audio interface running at 96 kHz or 192 kHz sample rate and speakers/transducers capable of reproducing those frequencies. Our generator will request the frequency from the browser regardless — you simply may not hear or measure it depending on hardware.
Features
Up to 60 kHz
Frequency slider extends well into the ultrasonic range for high-frequency experiments.
Step in 100 Hz
Tune precisely with 100 Hz steps across the ultrasonic spectrum.
Animal Device Testing
Verify that ultrasonic dog/rodent repellents are actually generating their advertised frequency.
No App Needed
Runs in any browser — easier than installing dedicated signal-generator software.
Real-Time Sweep
Drag the slider and the frequency updates instantly with no audible click.
Hardware Awareness
Honest about limitations — you need hi-res audio hardware to truly play above 22 kHz.
Common Uses
Test if your ultrasonic mouse/dog/cat repellent device is producing audio at all.
Drive transducers, piezo crystals, or cleaning baths for science experiments.
Sweep from 16 to 22 kHz to find the upper edge of your own hearing.
Test whether your hi-res audio interface really outputs above the standard 20 kHz ceiling.
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. Humans cannot hear sounds above about 20,000 Hz. 50 kHz is firmly in the ultrasonic range — animals like dogs, cats, bats, and rodents can hear parts of it.
Almost certainly not. Consumer speakers and laptop audio chips are designed for the human hearing range and typically roll off above 20 kHz. To actually produce 50 kHz you need a high-end audio interface (96 kHz+ sample rate) and ultrasonic transducers.
It can play the audio signal, but a phone or laptop speaker will not project it loud enough to repel a dog. Real ultrasonic repellents use specialised piezo transducers and high-voltage drivers.
Most browsers cap oscillator frequency at the AudioContext sample rate. We provide 60 kHz headroom so 50 kHz works comfortably on hi-res systems running at 96 kHz or 192 kHz.
At normal volumes, no. At very high SPL, ultrasonic frequencies can still cause hearing damage and discomfort even though you cannot consciously perceive them. Keep volume moderate.
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.