About the 17.4 kHz mosquito tone
Tones around 17,400 Hz became famous as the 'mosquito' ringtone and as a deterrent device, because many teenagers can hear them while many adults can't. Whether you hear it also depends on your speakers, many of which can't play this high.
A 17,400 Hz sine wave completes 17,400 cycles every second; each cycle lasts 0.057 ms, and the sound wave is about 2.0 cm long in air.
Start with the volume low and raise it slowly. Use the slider to move away from 17,400 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 · 8,000 Hz · 15,000 Hz · 20,000 Hz.
Questions
How do I play a 17,400 Hz tone?
Press Play above. The generator starts at exactly 17,400 Hz as a pure sine wave; you can change the wave shape and volume.
Why can't I hear 17,400 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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