About the 100 Hz tone
100 Hz is where many small speakers start to fade out. It's a good quick check of how much bass a pair of headphones or a laptop can really produce.
A 100 Hz sine wave completes 100 cycles every second; each cycle lasts 10.000 ms, and the sound wave is about 343.0 cm long in air. The nearest musical note is G2.
Start with the volume low and raise it slowly. Use the slider to move away from 100 Hz, or try another preset: 20 Hz · 40 Hz · 50 Hz · 60 Hz · 256 Hz · 432 Hz · 440 Hz · 528 Hz · 1,000 Hz · 8,000 Hz · 15,000 Hz · 17,400 Hz · 20,000 Hz.
Questions
How do I play a 100 Hz tone?
Press Play above. The generator starts at exactly 100 Hz as a pure sine wave; you can change the wave shape and volume.
Why can't I hear 100 Hz?
Your speakers or headphones may not reproduce it, the volume may be too low, or it may be outside your hearing range. Very low and very high tones are the hardest.
Is it safe to listen to test tones?
At a comfortable volume, yes. Start quiet, and stop if anything feels uncomfortable.
More free tools
Online tuner · Online metronome · BPM tapper · Interval ear training · Chord ear training · Tone deaf test · Vocal range test · Note frequency chart · Binaural beats generator · Frequency sweep generator · White, pink & brown noise · Tone generator · Perfect pitch test · Hearing test