Is this a spoof or not (Crafty & Adam_151 probably neede

[vokera80e]

Oldies can try http://www.ultrasonic-ringtones.com/ which has a tone as low as 8kHz which they say everyone should be able to hear.

very strange..i can hear 10KHz and 21.1KHz..
There must be a logical reason

 

[splinter]

I could hear them all ,once I turned the speakers up

 

[VeRetired]

Is this a genuine test or something a little sinister. Just as a precaution, make sure you haven't entered into a costly contract. If you some of you entered a personal mobile number you could regret it. Because as I read it, it states that the first call is free but thereafter it will run you £9.00 per week

 

[poshman]

i lost it at 13khz still i am 56 i wish the wife had a voice at 14khz

 

[johnny_t]

I've noticed a funny thing now - If I turn my sound right up, I can hear some of the 'higher' frequencies though the sound of them actually appears lower. One of the blog posts below alludes to it, but it might be a sub-harmonic at half the frequency.