I kind of believe this ... sort of. The problem is, I can't tell how much of what I'm hearing is the ring tone, and how much is resonance at lower frequencies in the speaker hardware.
But I like the conceit that I have good hearing.
You are in your twenties
You can still hear reasonably well and you can play this without my old fart colleagues hearing it which makes you feel kinda good.
The highest pitched ultrasonic mosquito ringtone that I can hear is
15.8kHzFind out which
ultrasonic ringtones you can hear!