About Audio Tone & Frequency Hearing Tester
Generate continuous audio tones across the entire audible human frequency spectrum (20 Hz to 20,000 Hz). Select sine, square, sawtooth, or triangle waveforms with volume ramps, fine-tuning buttons, stereo ear panning, and common acoustic presets.
Key Capabilities & Features
- Frequency range from 20 Hz to 20,000 Hz with 1Hz fine-tuning
- Sine, Square, Sawtooth, and Triangle waveforms
- Stereo ear balance / pan slider
- Pop-free soft attack and release volume ramps
- Acoustic presets (440Hz, 1000Hz, 50Hz, 15000Hz)
How to Use Audio Tone & Frequency Hearing Tester
1
Set Frequency
Drag the slider or click fine-tuning buttons.
2
Choose Waveform
Select Sine for pure tones or Sawtooth for harmonics.
3
Play Tone
Click Play Tone and adjust volume safely.
Privacy & In-Browser Execution Guarantee
Tones are synthesized directly by your browser Web Audio API.
Frequently Asked Questions
What is the standard concert pitch frequency?
A4 is internationally standardized at 440 Hz (established by ISO 16 in 1955).
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