Tone Generator & Frequency Sweep

Generate precise audio frequencies and smooth sweeps for gear testing, sound design, and hearing checks.

💡 Use Cases

Test Audio Gear: Push your speakers and headphones to their limits to see if they reproduce sub-bass or ultra-high frequencies.
Check Your Hearing: Explore your hearing range and test for "mosquito tones" (for curiosity, not medical diagnosis).
Burn-in Equipment: Run consistent tones to condition new drivers and break in high-end audio gear.
Calibrate Systems: Use reference pitches to tune instruments or align professional audio setups.

Slide to Adjust Frequency: Navigate from 20Hz to 20,000Hz instantly. The slider uses a logarithmic scale for precise control over musical pitches and frequency bands.
Toggle Waveforms: Switch between Sine (pure), Square (harmonic-rich), Sawtooth (bright), and Triangle (soft) to find the right texture for your test.
Run Frequency Sweeps: Define a start point, end point, and duration to glide through the spectrum. This is the fastest way to identify room resonance or speaker "dead zones."
Verify Stereo Balance: Adjust the L/R panning to isolate channels and verify your stereo image.

Why can’t I hear the high frequencies? Human hearing naturally declines with age, typically dropping off above 15kHz. Additionally, many consumer speakers and earbuds are physically unable to reproduce sounds at the extreme ends of the spectrum.
Why is there no sound? Check your system volume and ensure your browser tab isn't muted. Warning: Always start with your volume low to protect your ears and equipment.
Which waveform should I use? Use Sine for pure frequency testing. Use Square or Sawtooth if you need a "buzzier" sound with heavy harmonics to test filters or crossovers.

Concert Pitch: While 440Hz is the global standard for "A4," some orchestras tune to 442Hz for a brighter sound, while others prefer the 432Hz "natural" tuning.
Mosquito Tones: Because high-frequency hearing loss (presbycusis) is so common, sounds above 17.4kHz are often only audible to teenagers and young adults.
The Sub-Bass "Oomph": Frequencies below 60Hz are often felt physically rather than heard as a pitch. This range provides the cinematic impact in movie theaters and clubs.