its great for pissing of people but dont use too much or u might damage ur ear with such high sounds . even if u dont hear 22 khz even then dont bring it near ur ear coz it will have major damage to ur inner ear. stay safe guys.
It takes 40000 hz,s to repel flying insects such as mosquitos none of you bug repellent or high frequency sound apps go half as high, guess I'll stick with sprays.
Love it It is a good idea to put this so my friends would leave me in peace
Good for irratating people |TIP| set it as ur notification ring tone
I could've been deaf by now
I'm 56 and I can hear all frequencies
Frequency Sound Generator - waveform audio signal generator/ function generator