80 Hz tone
The usual subwoofer crossover.
Volume first. Turn your device volume down before pressing play, then raise it slowly. Tones start quiet on purpose. Keep headphones off your ears until you know how loud it is.
Hz
Logarithmic slider, 1 Hz to 22 kHz. Space bar starts and stops.Waveform
0 dBFS is the loudest your device can play; every 20 dB lower is a tenth of the amplitude.
What 80 Hz is used for
THX recommends an 80 Hz crossover for home theatre, so this is the pitch where the subwoofer hands over to the main speakers. It should sound equally strong from both.
| Period | 12.500 ms |
|---|---|
| Wavelength in air (20 °C) | 4.29 m |
| One octave down / up | 40 Hz / 160 Hz |
The generator above starts at 80 Hz. You can still move the slider to any other frequency, or open the full tone generator.
Questions people ask
Why can't I hear the 80 Hz tone?
Check the tab is not muted and the correct output device is selected. 80 Hz is well within the range of nearly every speaker and headphone.
How long is one cycle of 80 Hz?
12.500 milliseconds. In room-temperature air the wavelength is about 4.29 metres.
Keep testing
- Tone generatorSine, square, triangle and sawtooth from 1 Hz to 22 kHz.
- Frequency sweepLogarithmic or linear sweeps over any range and duration.
- Speaker testChannel, range and polarity checks for stereo speakers.