Silent Ring Tone Scam ??

Might be able to replace those high dollar tweeters with mobile phone speakers.

I don't know how loud it would be, however, it is being advertised widely now. I can only clearly hear to 10KHz on a sine wave, I get 12 - 16KHz on

1/3 oct Pink Noise. Why is there a difference. What I do notice is that even though I cannot hear the higher frequencies, I am left with a very specific feeling in my ears if I do play pink noise at the higher frequencies for more then a few seconds even though the volume is not high.

"APR"

** The pink noise probably still has components down to below 10kHz.

Depends how the 1/3 octave bands have been derived and how sharp the band limits are.

....... Phil

The disk I have is from a Mr Anderson, here in Australia off eBay. I believe he put this disk together for an audio course he was involved with.

Seeing they are a small speaker I would assume it would produce the higher frequencies more easily.

Michael