What Can You Use This For?
- Speaker testing — check frequency response of speakers, headphones, or subwoofers
- Instrument tuning — tune guitar, piano, violin by ear
- Hearing test — find the highest frequency you can hear
- Tinnitus matching — find the frequency of your tinnitus for masking
- Science experiments — acoustic beats, resonance demonstrations
FAQ
What's the difference between waveforms?
Sine is a pure, smooth tone. Square sounds buzzy and hollow. Sawtooth is bright and harsh. Triangle is softer than square but richer than sine.
Why can't I hear very low or very high frequencies?
Human hearing typically ranges from 20 Hz to 20,000 Hz. Most adults can't hear above 15,000 Hz. Small phone speakers can't reproduce frequencies below ~100 Hz.