What is a test tone for?

Speaker polarity checks, hearing range tests, ear training, tuning, tinnitus matching, and sound design starting points.

Why does square sound louder than sine at the same amplitude?

Square waves have harmonics at odd multiples of the fundamental. Total energy is higher than a sine at equal peak.

Tone Generator

Generate a pure sine, square, triangle, or sawtooth test tone. Useful for speaker calibration, tinnitus matching, and sound design seeds.

Frequency440 Hz

Waveform

Duration5.0 s

Amplitude50%

Fade edges50 ms

Format:

Reference pitches

A4 (concert pitch): 440 Hz
A5: 880 Hz
Middle C (C4): ~261.6 Hz
E2 (low E on guitar): ~82.4 Hz
Hearing test fatigue: 8000 Hz

Always start at low amplitude when using test tones with headphones. Sine waves near your ear’s resonance (2–5 kHz) can damage hearing at levels that feel moderate.

Related tools

Need broadband test sound instead? Noise generator
Shape a tone with EQ? Audio equalizer

No files involved — the tone is synthesized locally in your browser.