About the 8 kHz tone
8,000 Hz is a common top frequency in standard hearing tests. Most people of any age hear it clearly at a normal volume, so it's a good reference point before trying higher tones.
A 8,000 Hz sine wave completes 8,000 cycles every second; each cycle lasts 0.125 ms, and the sound wave is about 4.3 cm long in air. The nearest musical note is B8.
Start with the volume low and raise it slowly. Use the slider to move away from 8,000 Hz, or try another preset: 20 Hz · 40 Hz · 50 Hz · 60 Hz · 100 Hz · 256 Hz · 432 Hz · 440 Hz · 528 Hz · 1,000 Hz · 15,000 Hz · 17,400 Hz · 20,000 Hz.
Questions
How do I play a 8,000 Hz tone?
Press Play above. The generator starts at exactly 8,000 Hz as a pure sine wave; you can change the wave shape and volume.
Why can't I hear 8,000 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.
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