Generate a test tone from 40 Hz to 18 kHz
Choose an exact frequency and play a pure sine wave for speaker checks, resonance testing and careful audio experiments in your browser.
Use dry, normally working equipment. Start low, set headphones up outside your ears, and stop at discomfort, distortion or unusual heat.
A clean test starts with a simple setup.
- 01
Start at low volume—pure tones can feel louder than music.
- 02
Choose a preset or move the frequency control.
- 03
Do not use very low frequencies to force a phone speaker.
- 04
Stop immediately if you hear harsh distortion or feel discomfort.
If your device is hot, swollen, wet inside or completely silent after drying, stop testing and contact a qualified technician.
Before you test
01How do I generate a specific frequency online?+
Use the slider or a preset to choose a frequency from 40 Hz to 18 kHz, then press Play frequency. Start with a low listening level.
02What frequency removes water from a speaker?+
There is no single universal frequency for every speaker design. Use the full nBeats water-eject sequence for that task instead of a sustained test tone.
03Why can’t I hear very high frequencies?+
Hearing sensitivity and speaker output naturally fall at high frequencies. The result is not a medical hearing test.