50 Hz Tone
Continuous 50 Hz reference tone — play instantly in your browser.
Fixed frequency: 50 Hz (Power-line test (EU))
Download a 50 Hz reference WAV (2 seconds, 44.1 kHz).
What this tool does
A 50 Hz tone vibrates 50 times per second. European mains frequency reference at 50 Hz AC. This page locks the frequency so you can listen, compare equipment, or export a WAV without adjusting sliders.
How to use it
Tap Play to unlock audio (required on mobile browsers). Start at low volume, especially with headphones. Switch waveform to hear how harmonics change timbre while the fundamental stays at 50 Hz. Use Download WAV for an offline reference file.
Practical applications
50 Hz sits in the audible range for equipment testing and reference listening. Use it alongside our tone generator hub for nearby frequencies or our test tone download for offline files.
Frequently asked questions
What is 50 Hz hum?
50 Hz is AC mains frequency in Europe, Asia, and much of the world outside North America.
How does 50 Hz compare to 60 Hz?
60 Hz is used in North America. Try our 60 Hz Hum page to compare.
Last updated: September 2025. Technical values (Hz) are locale-invariant.