Playing tones at extreme volumes can damage your hearing or your speakers.

• Humans generally cannot hear sounds below 20 Hz or above 10,000 Hz very well.
• Increasing volume to compensate for inaudible frequencies can:
  • Expose your ears to harmful sound levels
  • Subject speakers to dangerous electrical currents

• Find a comfortable volume level using a 1,000 Hz tone
• Do not exceed this level, even if:
  • You can’t hear much sound
  • You’re testing high frequencies (where hearing is most fragile)

• Play / Pause: Click Play or press Space

• Drag the slider or press ← / →
• ±1 Hz: Buttons or Shift + ← / →
• ±0.01 Hz: Ctrl + ← / →
• ±0.001 Hz: Ctrl + Shift + ← / →
• Octave shift:
  • ×½ → Half the frequency
  • ×2 → Double the frequency

Switch from a sine wave (pure tone) to:

• Square
• Triangle
• Sawtooth
  by clicking the Wave button

• Open the Frequator WApp in multiple browser tabs

• Instrument tuning
• Testing speakers and headphones
• Finding subwoofer frequency limits

• Resonance experiments
  (e.g., finding the resonant frequency of a wine glass)

• Determine the highest frequency you can hear
• Detect ear-specific frequency perception

If you have pure-tone tinnitus, this tool can help identify its frequency.

• Enables better masking sound selection
• Supports frequency discrimination training

When you find a matching tone:

• Also test:
  • One octave higher (×2)
  • One octave lower (×½)

Tones one octave apart are often confused.

Researchers at MIT are studying whether 40 Hz tones can reverse certain molecular changes in Alzheimer’s disease.

• 🧪 Animal studies (transgenic mice) showed promising results
• 👥 Early human trials are inconclusive
• 🔍 Further research is ongoing

⚠️ This tone generator is not a medical device and no guarantees are made.

© 2025 MicroResearch Corporation®
All Rights Reserved.

Created by M Ramzan Ch with ❤️
Blog • Privacy Policy • Contact Me