The following audio files are half-second tones set at the frequency of their file names.
For example: The first clip is “10,000 Hz.mp3”; the audio is a 10,000Hz tone.
What’s so interesting about this? Quite simply, you
will should not be able to hear all of the clips. I can hear all of them up to 17,000Hz, and then somewhere in between 17,000Hz and 18,000Hz my hearing reaches its limit.
Two things to note: If your volume level is high enough to hear one of the clips, no ammount of adjustment will allow you to hear clips that you can’t. If you turn up your speakers too high, you may simply be hearing the electronic buzzing that all speakers make.
Also, I recommend playing the files on loop.
Update: Problems fixed!
Here are the files: