Online Tone and Frequency Generator

Generate sine, square, triangle and sawtooth waves. Test your speakers, headphones or subwoofer with frequencies from 20Hz to 20kHz.

Audio Generator

Tone Generator

Generate pure frequencies for audio testing.

440 Hz
20Hz (Sub-bass) 20kHz (Ultrasound)
Utilities Studio

Want this utility on your website?

Customize colors and dark mode for WordPress, Notion or your own site.

Go Ahead

Frequently Asked Questions

What is a frequency generator used for?

It is used to test the frequency response of speakers and headphones, detect unwanted resonances in furniture, find gaps in your hearing range, or even help calm tinnitus through notch therapy.

What is a sine wave versus a square wave?

A sine wave is a pure tone with no harmonics (smooth and round). A square wave is rich in odd harmonics and sounds much more aggressive or digital. The triangle wave sits in between, useful for audio synthesis.

Can I damage my speakers with this tool?

Yes, if you use very high volumes at extreme frequencies (especially bass below 30Hz or treble above 15kHz). Always start with a low system volume and increase gradually.

What is the human hearing range?

Theoretically 20Hz to 20,000Hz (20kHz). However, with age it is normal to lose the ability to hear above 15kHz. This test can help you verify your personal upper limit.

# Everything About Frequencies and Sound Waves

Sound is pure physics in motion. This tool lets you manipulate sound waves in real time, from the deepest bass you can feel in your chest to the ultrasonic highs only animals can perceive.

# Human Hearing Range and Presbycusis

A healthy human ear perceives sounds between 20Hz and 20kHz. With age, the upper limit drops: most adults over 50 cannot hear above 12kHz. The 17.4kHz tone, known as the "mosquito tone", is a classic test that only teenagers can typically pass.

# Wave Types and Their Uses

Sine: pure tone with no harmonics, used in medical hearing tests and instrument calibration. Square: rich in odd harmonics, sounds like retro 8-bit consoles. Sawtooth: contains all harmonics, the basis of electronic music synthesisers. Triangle: midpoint between sine and square — smoother than square but with more harmonic content than sine.

# Speaker Testing and Vibration Cleaning

A low-frequency wave (typically 165Hz) at maximum volume with a square or sawtooth shape forces the speaker diaphragm to vibrate violently, mechanically expelling water droplets trapped in the grille. Do not play extremely high frequencies at maximum volume for long periods: even if you cannot hear them, the energy can damage your equipment's tweeters.

Bibliographic References

More utilities from Hardware Testing & Diagnostic Tools

Dead Pixel Test and Screen Repair Tool

Check if your monitor has dead or stuck pixels and repair them with our high-frequency strobe tool online.

Use Tool

Online Keyboard Test & Ghosting Detector

Check if your keyboard suffers from Ghosting or Key Jamming. Real-time key visualizer and N-Key Rollover counter.

Use Tool

Online Gamepad & Controller Test

Test your Xbox, PlayStation or PC controller. Visualize dead zones, joystick drift and buttons.

Use Tool

Online Gamepad Vibration Tester

Test the haptic motors and Dual-Rumble vibration of your gamepad in the browser. Supports Xbox, DualShock, DualSense and generic controllers.

Use Tool

Online Mouse Polling Rate Test

Check the real Hz of your mouse. Verify if your gaming mouse works at 1000Hz or more with our professional tool.

Use Tool

Lithium Battery Health Calculator

Calculate the State of Health (SoH) of your lithium battery based on cycles, voltage and temperature. Scientific guide to maximize energy longevity.

Use Tool