50 Hz Tone Generator
A free online tone generator producing a pure 50 Hz signal in your browser. European mains hum. Pick a waveform, hit play, and adjust the volume slowly.
What is 50 Hz used for?
50 Hz is the AC mains frequency throughout Europe and most of Asia. If you hear a hum at 50 Hz in a recording, it's almost always interference from electrical wiring nearby.
For european mains hum, set the volume to roughly 30% before pressing play. 50 Hz can sound deceptively quiet at full volume — always start low to protect your speakers and ears.
How to use it
Press the play button on the preview above to hear 50 Hz immediately. To customize the waveform (sine, square, sawtooth, triangle), tweak the volume curve, or add a second tone for beat-frequency comparison, open the full tone generator. The closest musical pitch to 50 Hz is approximately G1 (+35¢).
FAQs
Why does 50 Hz sound different on different speakers?
Speaker frequency response varies dramatically. Small monitors and laptop speakers struggle below about 80 Hz; tweeters distort above 16 kHz on cheaper systems. If 50 Hz sounds quiet, distorted, or buzzy, your hardware is likely the limit — not the tone itself.
Is it safe to listen to 50 Hz?
At reasonable volumes, yes. Sustained exposure to any frequency at high volume can damage your hearing. Always start at 0 volume, ramp up slowly, and don't wear headphones at full volume on this page.
What's the closest musical note to 50 Hz?
50 Hz corresponds to approximately G1 (+35¢). For exact tuning, use the chromatic tuner.